NITROGEN-CONTAINING LUMINESCENT PARTICLE AND METHOD FOR PREPARING SAME, NITROGEN-CONTAINING ILLUMINANT, AND LUMINESCENT DEVICE

Abstract

The present invention discloses a nitrogen-containing luminescent particle, characterized in that a structure of the nitrogen-containing luminescent particle is divided into an oxygen poor zone, a transition zone, and an oxygen rich zone from a core to an outer surface of the particle depending on an increasing oxygen content, the oxygen poor zone being predominantly a nitride luminescent crystal or oxygen-containing solid solution thereof, the transition zone being predominantly a nitroxide material, the oxygen rich zone being predominantly an oxide material or oxynitride material; the nitride luminescent crystal or oxygen-containing solid solution thereof has a chemical formula of M.sub.m-m1A.sub.a1B.sub.b1O.sub.o1N.sub.n1:R.sub.m1, the nitroxide material has a chemical formula of M.sub.m-m2A.sub.a2B.sub.b2O.sub.o2N.sub.n2:R.sub.m2, the oxide material or oxynitride material has a chemical formula of M.sub.m-m3A.sub.a3B.sub.b3O.sub.o3N.sub.n3:R.sub.m3. The nitrogen-containing luminescent particle and the nitrogen-containing illuminant of the present invention have good chemical stability, good aging and light decay resistance, and high luminescent efficiency, and are useful for various luminescent devices. The manufacturing method of the present invention is easy and reliable, and useful for industrial mass production.

Claims

24. A nitrogen-containing luminescent particle, wherein a structure of the nitrogen-containing luminescent particle is divided into an oxygen poor zone, a transition zone, and an oxygen rich zone from a core to an outer surface of the particle depending on an increasing oxygen content, the oxygen poor zone being predominantly a nitride luminescent crystal or oxygen-containing solid solution thereof, the transition zone being predominantly a nitroxide material, the oxygen rich zone being predominantly an oxide material or oxynitride material; the nitride luminescent crystal or oxygen-containing solid solution thereof has a chemical formula of M.sub.m-m1A.sub.a1B.sub.b1O.sub.o1N.sub.n1:R.sub.m1, the nitroxide material has a chemical formula of M.sub.m-m2A.sub.a2B.sub.b2O.sub.o2N.sub.n2:R.sub.m2, the oxide material or oxynitride material has a chemical formula of M.sub.m-m3A.sub.a3B.sub.b3O.sub.o3N.sub.n3:R.sub.m3; in the chemical formulas, the M element is at least one of Mg, Ca, Sr, Ba, Zn, Li, Na, K, Y, and Sc, the A element is at least one of B, Al, Ga, and In, the B element is at least one of C, Si, Ge, and Sn, R is at least one of Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu, wherein 0.5≦m≦1.5, 0.001≦m1≦0.2, 0.5≦a1≦1.5, 0.5≦b1≦1.5, 0≦o1≦0.5, 2.5≦n1≦3.5, 0≦m2≦0.2, 0.5≦a2≦1.5, 0.5≦b2≦1.5, 0.1≦o2≦4, 0.1≦n2≦3, 0≦m3≦0.2, 0.5≦a3≦1.5, 0.5≦b3≦1.5, 3≦o3≦5, 0≦n3≦0.5.

25. The nitrogen-containing luminescent particle of claim 24, wherein the transition zone has a thickness ranging from 50-500 nm, the oxygen rich zone is at the outer side of the transition zone and has a thickness of no more than 50 nm, and the oxygen poor zone is from the inner side of the transition zone to the core of the nitrogen-containing luminescent particle.

26. The nitrogen-containing luminescent particle of claim 24, wherein the nitride luminescent crystal or oxygen-containing solid solution thereof in the oxygen poor zone has a content of no less than 90%, the nitroxide material in the transition zone has a content of no less than 60%, and the oxide material or oxynitride material in the oxygen rich zone has a content of no less than 50%.

27. The nitrogen-containing luminescent particle of claim 24, wherein the nitride luminescent crystal is at least one of (Sr.sub.xCa.sub.1-x-y1)AlSiN.sub.3:y1Eu or an oxygen-containing solid solution thereof, the nitroxide material is (Sr.sub.xCa.sub.1-x-y1)AlSiN.sub.3-z1O.sub.1.5z1:y1Eu, and the oxide material or oxynitride material is (Sr.sub.xCa.sub.1-x-y1)AlSiO.sub.4.5-z2N.sub.z2:y1Eu, wherein 0≦x≦0.99, 0.001≦y1≦0.2, 0<z1<3, 0≦z2<0.5.

28. The nitrogen-containing luminescent particle of claim 24, wherein the oxygen poor zone further comprises a nitroxide luminescent crystal, the transition zone further comprises a nitride material, and the oxygen rich zone further comprises a nitroxide material.

29. The nitrogen-containing luminescent particle of claim 24, wherein the material of the structure of the nitrogen-containing luminescent particle is a compound or a mixture.

30. The nitrogen-containing luminescent particle of claim 24, wherein it is excited at an excitation wavelength ranging from 300-500 nm to emit red light having a peak wavelength at 600-670 nm.

31. A nitrogen-containing illuminant, comprising: a mixture of nitrogen-containing luminescent particles and other crystalline grains or non-crystalline particles, wherein the nitrogen-containing luminescent particles are present in the mixture at a proportion of no less than 50 wt %.

32. A method for preparing the nitrogen-containing luminescent particle comprising: step 1: weighting desired starting materials at a stoichiometric ratio of cations in the composition of a chemical formula M.sub.m-m1A.sub.a1B.sub.b1O.sub.o1N.sub.n1:R.sub.m1, with a nitride, oxide or halide of M, A, B, and R as starting materials; step 2: uniformly mixing the starting materials weighted in the step 1 in a nitrogen atmosphere to form a mix; step 3: subjecting the mix obtained in the step 2 to high-temperature calcination in a calcination atmosphere, followed by low-temperature calcination at a reduced predetermined temperature in a nitrogen-oxygen mixture or air atmosphere, to give a nitrogen-containing luminescent particle semi-product; and step 4: subjecting the nitrogen-containing luminescent particle semi-product obtained in the step 3 to a post-treatment, to give a nitrogen-containing luminescent particle product.

33. A method for preparing the nitrogen-containing luminescent particle comprising: step 1: weighting desired starting materials at a stoichiometric ratio of cations in the composition of a chemical formula M.sub.m-m1A.sub.a1B.sub.b1O.sub.o1N.sub.n1:R.sub.m1, with a nitride, oxide or halide of M, A, B, and R as starting materials; step 2: uniformly mixing the starting materials weighted in the step 1 in a nitrogen atmosphere to form a mix; step 3: subjecting the mix obtained in the step 2 to high-temperature calcination in a calcination atmosphere, to give a nitrogen-containing luminescent particle semi-product; step 4: subjecting the nitrogen-containing luminescent particle semi-product obtained in the step 3 to a post-treatment; and step 5: subjecting the nitrogen-containing luminescent particle obtained in the step 4 to low-temperature calcination in a nitrogen-oxygen mixture or air atmosphere, to give a nitrogen-containing luminescent particle product.

34. The method for preparing the nitrogen-containing luminescent particle of claim 33, wherein in the step 3, the high-temperature calcination has a temperature of 1400-2000° C. and a duration of 6-18 h.

35. The method for preparing the nitrogen-containing luminescent particle of claim 34, wherein in the step 3, the high-temperature calcination has a temperature of 1400-2000° C. and a duration of 6-18 h.

36. The method for preparing the nitrogen-containing luminescent particle of claim 33, wherein in the step 3, the atmosphere of the high-temperature calcination is a nitrogen atmosphere, a nitrogen-argon mixture atmosphere, another inert gas atmosphere, a nitrogen-hydrogen mixture atmosphere, or another reducing gas atmosphere.

37. The method for preparing the nitrogen-containing luminescent particle of claim 34, wherein in the step 3, the atmosphere of the high-temperature calcination is a nitrogen atmosphere, a nitrogen-argon mixture atmosphere, another inert gas atmosphere, a nitrogen-hydrogen mixture atmosphere, or another reducing gas atmosphere.

38. The method for preparing the nitrogen-containing luminescent particle of claim 33, wherein in the step 3, the pressure of the high-temperature calcination is 1-100 atm.

39. The method for preparing the nitrogen-containing luminescent particle of claim 34, wherein that in the step 3, the pressure of the high-temperature calcination is 1-100 atm.

40. The method for preparing the nitrogen-containing luminescent particle of claim 33, wherein in the step 3, the low-temperature calcination has a temperature of 200-450° C. and a duration of 1-24 h; the feeding rate of the nitrogen-oxygen mixture or air in the low-temperature calcination is 0.1-10 L/min; and the volume percent of oxygen in the nitrogen-oxygen mixture atmosphere is no more than 20%.

41. The method for preparing the nitrogen-containing luminescent particle of claim 33, wherein in the step 4, the post-treatment comprises grinding, screening, washing, drying, wherein the washing is performed to obtain the nitrogen-containing luminescent particle product having a conductivity of less than 10 μs/cm.

42. The method for preparing the nitrogen-containing luminescent particle of claim 34, wherein that in the step 4, the post-treatment comprises grinding, screening, washing, drying, wherein the washing is performed to obtain the nitrogen-containing luminescent particle product having a conductivity of less than 10 μs/cm.

43. The method for preparing the nitrogen-containing luminescent particle of claim 34, wherein in the step 5, the low-temperature calcination has a temperature of 200-450° C. and a duration of 1-24 h.

44. The method for preparing the nitrogen-containing luminescent particle of claim 34, wherein in the step 5, the volume percent of oxygen in the nitrogen-oxygen mixture atmosphere is no more than 20%.

45. A luminescent device, characterized by at least comprising an LED chip emitting UV light, violet light or blue light, and a fluorescent powder, wherein the fluorescent powder comprises: a nitrogen-containing luminescent particle, characterized in that a structure of the nitrogen-containing luminescent particle is divided into an oxygen poor zone, a transition zone, and an oxygen rich zone from a core to an outer surface of the particle depending on an increasing oxygen content, the oxygen poor zone being predominantly a nitride luminescent crystal or oxygen-containing solid solution thereof, the transition zone being predominantly a nitroxide material, the oxygen rich zone being predominantly an oxide material or oxynitride material; the nitride luminescent crystal or oxygen-containing solid solution thereof has a chemical formula of M.sub.m-m1A.sub.a1B.sub.b1O.sub.o1N.sub.n1:R.sub.m1, the nitroxide material has a chemical formula of M.sub.m-m2A.sub.a2B.sub.b2O.sub.o2N.sub.n2:R.sub.m2, the oxide material or oxynitride material has a chemical formula of M.sub.m-m3A.sub.a3B.sub.b3O.sub.o3N.sub.n3:R.sub.m3; in the chemical formulas, the M element is at least one of Mg, Ca, Sr, Ba, Zn, Li, Na, K, Y, and Sc, the A element is at least one of B, Al, Ga, and In, the B element is at least one of C, Si, Ge, and Sn, R is at least one of Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu, wherein 0.5≦m≦1.5, 0.001≦m1≦0.2, 0.5≦a1≦1.5, 0.5≦b1≦1.5, 0≦o1≦0.5, 2.5≦n1≦3.5, 0≦m2≦0.2, 0.5≦a2≦1.5, 0.5≦b2≦1.5, 0.1≦o2≦4, 0.1≦n2≦3, 0≦m3≦0.2, 0.5≦a3≦1.5, 0.5≦b3≦1.5, 3≦o3≦5, 0≦n3≦0.5.

46. A luminescent device, characterized by at least comprising an LED chip emitting UV light, violet light or blue light, and a fluorescent powder, wherein the fluorescent powder at least uses the nitrogen-containing illuminant comprising: a mixture of nitrogen-containing luminescent particles and other crystalline grains or non-crystalline particles, wherein the nitrogen-containing luminescent particles are present in the mixture at a proportion of no less than 50 wt %.

47. The luminescent device of claim 46, wherein further comprising other types of fluorescent powders, so as to meet lighting requirements or applications in high-color-rendering white light LEDs in the backlight, by complementation of luminescent colors.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0031] FIG. 1 is a cross-sectional diagram of a structure of a nitrogen-containing luminescent particle of the present invention.

[0032] FIG. 2 is emission spectra of nitrogen-containing luminescent particles from examples 1-4 and a comparative example 1 of the present invention.

[0033] FIG. 3 is excitation spectra of the nitrogen-containing luminescent particles from the examples 1-4 and the comparative example 1 of the present invention.

[0034] FIG. 4 is X-ray diffraction patterns of the nitrogen-containing luminescent particles from the examples 1-4 and the comparative example 1 of the present invention.

[0035] FIG. 5 is an SEM picture of the nitrogen-containing luminescent particle from the example 4 of the present invention.

[0036] FIG. 6 is an SEM picture of the nitrogen-containing luminescent particle from the comparative example 1 of the present invention.

[0037] FIG. 7 is emission spectra of nitrogen-containing luminescent particles from examples 10-13 and a comparative example 3 of the present invention.

[0038] FIG. 8 is thermal quenching spectra of the nitrogen-containing luminescent particles from the examples 10-13 and the comparative example 3 of the present invention.

[0039] FIG. 9 is emission spectra of nitrogen-containing luminescent particles from examples 15-18 and a comparative example 4 of the present invention.

[0040] FIG. 10 is thermal quenching spectra of nitrogen-containing luminescent particles from examples 19-21 and a comparative example 5 of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

[0041] A detailed description of the present invention will be further given below in detail with reference to the accompanying drawings and embodiments.

[0042] Referring to FIG. 1, a nitrogen-containing luminescent particle of the present invention is shown. A structure of the nitrogen-containing luminescent particle is divided into an oxygen poor zone, a transition zone, and an oxygen rich zone from a core to an outer surface of the particle depending on an increasing oxygen content, the oxygen poor zone being predominantly a nitride luminescent crystal or oxygen-containing solid solution thereof, the transition zone being predominantly a nitroxide material, the oxygen rich zone being predominantly an oxide material or oxynitride material; the nitride luminescent crystal or oxygen-containing solid solution thereof has a chemical formula of M.sub.m-m1A.sub.a1B.sub.b1O.sub.o1N.sub.n1:R.sub.m1, the nitroxide material has a chemical formula of M.sub.m-m2A.sub.a2B.sub.b2O.sub.o2N.sub.n2:R.sub.m2, the oxide material or oxynitride material has a chemical formula of M.sub.m-m3A.sub.a3B.sub.b3O.sub.o3N.sub.r3:R.sub.m3; in the chemical formulas, the M element is at least one of Mg, Ca, Sr, Ba, Zn, Li, Na, K, Y, and Sc, the A element is at least one of B, Al, Ga, and In, the B element is at least one of C, Si, Ge, and Sn, R is at least one of Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu, wherein 0.5≦m≦1.5, 0.001≦m1≦0.2, 0.5≦a1≦1.5, 0.5≦b1≦1.5, 0≦o1≦0.5, 2.5≦n1≦3.5, 0≦m2≦0.2, 0.5≦a2≦1.5, 0.5≦b2≦1.5, 0.1≦o2≦4, 0.1≦n2≦3, 0≦m3≦0.2, 0.5≦a3≦1.5, 0.5≦b3≦1.5, 3≦o3≦5, 0≦n3≦0.5.

[0043] Further preferred embodiments of a nitrogen-containing luminescent particle of the present invention include the following.

[0044] The transition zone has a thickness ranging from 50-500 nm, the oxygen rich zone is at the outer side of the transition zone and has a thickness of no more than 50 nm, and the oxygen poor zone is from the inner side of the transition zone to the core of the nitrogen-containing luminescent particle.

[0045] The nitride luminescent crystal or oxygen-containing solid solution thereof in the oxygen poor zone has a content of no less than 90%, the nitroxide material in the transition zone has a content of no less than 60%, and the oxide material or oxynitride material in the oxygen rich zone has a content of no less than 50%.

[0046] The nitride luminescent crystal is at least one of (Sr.sub.xCa.sub.1-x-y1)AlSiN.sub.3:y1Eu or an oxygen-containing solid solution thereof, the nitroxide material is (Sr.sub.xCa.sub.1-x-y1)AlSiN.sub.3-z1O.sub.1.5z1:y1Eu, and the oxide material or oxynitride material is (Sr.sub.xCa.sub.1-x-y1)AlSiO.sub.4.5-z2N.sub.z2:y1Eu, wherein 0≦x≦0.99, 0.001≦y1≦0.2, 0<z1<3, 0<z2<0.5.

[0047] The oxygen poor zone further comprises a nitroxide luminescent crystal, the transition zone further comprises a nitride material, and the oxygen rich zone further comprises a nitroxide material.

[0048] The material of the structure of the nitrogen-containing luminescent particle is a compound or a mixture.

[0049] Any of the nitrogen-containing luminescent particles of the present invention as described above is excited at an excitation wavelength ranging from 300-500 nm to emit red light having a peak wavelength at 600-670 nm.

[0050] A nitrogen-containing illuminant according to the present invention comprises a mixture of any of the nitrogen-containing luminescent particles of the present invention as described above and other crystalline grains or non-crystalline particles, the nitrogen-containing luminescent particle being present in the mixture at a proportion of no less than 50 wt %.

[0051] A method 1 for preparing a nitrogen-containing luminescent particle and preferred embodiments thereof according to the present invention comprises the following specific steps:

[0052] step 1: weighting desired starting materials at a stoichiometric ratio of cations in the composition of a chemical formula M.sub.m-m1A.sub.a1B.sub.b1O.sub.o1N.sub.n1:R.sub.m1, with a nitride, oxide or halide of M, A, B, and R as starting materials;

[0053] step 2: uniformly mixing the starting materials weighted in the step 1 in a nitrogen atmosphere to form a mix;

[0054] step 3: subjecting the mix obtained in the step 2 to high-temperature calcination in a calcination atmosphere, followed by low-temperature calcination at a reduced predetermined temperature in a nitrogen-oxygen mixture or air atmosphere, to give a nitrogen-containing luminescent particle semi-product;

[0055] wherein the high-temperature calcination has a temperature of 1400-2000° C. and a duration of 6-18 h; the atmosphere of the high-temperature calcination is a nitrogen atmosphere, a nitrogen-argon mixture atmosphere, another inert gas atmosphere, a nitrogen-hydrogen mixture atmosphere, or another reducing gas atmosphere; the pressure of the high-temperature calcination is 1-100 atm; the low-temperature calcination has a temperature of 200-450° C. and a duration of 1-24 h; the feeding rate of the nitrogen-oxygen mixture or air in the low-temperature calcination is 0.1-10 L/min; and the volume percent of oxygen in the nitrogen-oxygen mixture atmosphere is no more than 20%; and

[0056] step 4: subjecting the nitrogen-containing luminescent particle semi-product obtained in the step 3 to a post-treatment, to give a nitrogen-containing luminescent particle product; wherein the post-treatment includes grinding, screening, washing, drying, and the washing is performed to obtain the nitrogen-containing luminescent particle product having a conductivity of less than 10 μs/cm.

[0057] A method 2 for preparing a nitrogen-containing luminescent particle and preferred embodiments thereof according to the present invention comprises the following specific steps:

[0058] step 1: weighting desired starting materials at a stoichiometric ratio of cations in the composition of a chemical formula M.sub.m-m1A.sub.a1B.sub.b1O.sub.o1N.sub.n1:R.sub.m1, with a nitride, oxide or halide of M, A, B, and R as starting materials;

[0059] step 2: uniformly mixing the starting materials weighted in the step 1 in a nitrogen atmosphere to form a mix;

[0060] step 3: subjecting the mix obtained in the step 2 to high-temperature calcination in a calcination atmosphere, to give a nitrogen-containing luminescent particle semi-product;

[0061] wherein the high-temperature calcination has a temperature of 1400-2000° C. and a duration of 6-18 h; the atmosphere of the high-temperature calcination is a nitrogen atmosphere, a nitrogen-argon mixture atmosphere, another inert gas atmosphere, a nitrogen-hydrogen mixture atmosphere, or another reducing gas atmosphere; and the pressure of the high-temperature calcination is 1-100 atm;

[0062] step 4: subjecting the nitrogen-containing luminescent particle semi-product obtained in the step 3 to a post-treatment; wherein the post-treatment includes grinding, screening, washing, drying, and the washing is performed to obtain the nitrogen-containing luminescent particle product having a conductivity of less than 10 μs/cm; and

[0063] step 5: subjecting the nitrogen-containing luminescent particle obtained in the step 4 to low-temperature calcination in a nitrogen-oxygen mixture or air atmosphere, to give a nitrogen-containing luminescent particle product; wherein the low-temperature calcination has a temperature of 200-450° C. and a duration of 1-24 h; and the volume percent of oxygen in the nitrogen-oxygen mixture atmosphere is no more than 20%.

[0064] A luminescent device according to the present invention at least comprises an LED chip emitting UV light, violet light or blue light, and a fluorescent powder, wherein the fluorescent powder at least uses any of the nitrogen-containing luminescent particles of the present invention as described above.

[0065] A luminescent device according to the present invention at least comprises an LED chip emitting UV light, violet light or blue light, and a fluorescent powder, wherein the fluorescent powder at least uses the nitrogen-containing illuminant of the present invention as described above.

[0066] Further preferably, a luminescent device according to the present invention further comprises other types of fluorescent powders, so as to meet lighting requirements or applications in high-color-rendering white light LEDs in the backlight, by complementation of luminescent colors.

[0067] Specific examples and comparative examples of a nitrogen-containing luminescent particle and method for preparing a same according to the present invention are further disclosed below, wherein the examples means that a nitrogen-containing luminescent particle product is obtained following a structure of a nitrogen-containing luminescent particle and method for preparing a same of the present invention, and the comparative examples means that a nitrogen-containing luminescent particle product is obtained following a nitrogen-containing luminescent particle and method for preparing a same disclosed in the prior art. The average oxygen atom content and the average nitrogen atom content in the nitrogen-containing luminescent particles are obtained by an oxygen/nitrogen analyzer.

Example 1

[0068] 0.27 g of Ca.sub.3N.sub.2, 9.954 g of Sr.sub.3N.sub.2, 4.477 g of AlN, 5.107 g of Si.sub.3N.sub.4, and 0.192 g of Eu.sub.2O.sub.3 were weighted. These starting materials were thoroughly mixed in a nitrogen atmosphere for 3 h and charged into an Mo crucible, which was rapidly transferred to a tubular furnace, and then the temperature was gradually raised to 1700° C. under a nitrogen atmosphere for 12 h; the resulting nitrogen-containing luminescent particle was pulverized and sieved, the sieved nitrogen-containing luminescent particle was placed into deionized water and stirred for 30 min, then suction-filtered, and finally washed to a conductivity of 8.56 μs/cm, and after drying, the temperature was raised to 400° C. in an air atmosphere for calcination for 5 h, to give a nitrogen-containing luminescent particle product. The emission spectrum is shown in FIG. 2, the excitation spectrum is shown in FIG. 3, and the X-ray diffraction pattern is shown in FIG. 4. The chemical composition of the oxygen poor zone of the nitrogen-containing luminescent particle is Ca.sub.0.05Sr.sub.0.94AlSiN.sub.3:0.01Eu, the chemical composition of the transition zone is Ca.sub.0.05Sr.sub.0.94AlSiO.sub.1.5N.sub.2:0.01Eu, with a thickness of 400 nm, and the chemical composition of the oxygen rich zone is Ca.sub.0.05Sr.sub.0.94AlSiO.sub.4.5:0.01Eu, with a thickness of 30 nm.

Example 2

[0069] 0.435 g of Ca.sub.3N.sub.2, 9.712 g of Sr.sub.3N.sub.2, 4.512 g of AlN, 5.147 g of Si.sub.3N.sub.4, and 0.194 g of Eu.sub.2O.sub.3 were weighted. These starting materials were thoroughly mixed in a nitrogen atmosphere for 3 h and charged into an Mo crucible, which was rapidly transferred to a tubular furnace, and then the temperature was gradually raised to 1700° C. under a nitrogen atmosphere for 12 h; the resulting nitrogen-containing luminescent particle was pulverized and sieved, the sieved nitrogen-containing luminescent particle was placed into deionized water and stirred for 30 min, then suction-filtered, and finally washed to a conductivity of 4.42 μs/cm, and after drying, the temperature was raised to 400° C. in an air atmosphere for calcination for 5 h, to give a nitrogen-containing luminescent particle product. The emission spectrum is shown in FIG. 2, the excitation spectrum is shown in FIG. 3, and the X-ray diffraction pattern is shown in FIG. 4. The chemical composition of the oxygen poor zone of the nitrogen-containing luminescent particle is Ca.sub.0.08Sr.sub.0.91AlSiN.sub.3:0.01Eu, the chemical composition of the transition zone is Ca.sub.0.08Sr.sub.0.91AlSiO.sub.1.8N.sub.1.8:0.01Eu, with a thickness of 380 nm, and the chemical composition of the oxygen rich zone is Ca.sub.0.08Sr.sub.0.91AlSi.sub.0.7O.sub.3.9:0.01Eu, with a thickness of 25 nm.

Example 3

[0070] 0.547 g of Ca.sub.3N.sub.2, 9.549 g of Sr.sub.3N.sub.2, 4.535 g of AlN, 5.174 g of Si.sub.3N.sub.4, and 0.195 g of Eu.sub.2O.sub.3 were weighted. These starting materials were thoroughly mixed in a nitrogen atmosphere for 3 h and charged into an Mo crucible, which was rapidly transferred to a tubular furnace, and then the temperature was gradually raised to 1700° C. under a nitrogen atmosphere for 12 h; the resulting nitrogen-containing luminescent particle was pulverized and sieved, the sieved nitrogen-containing luminescent particle was placed into deionized water and stirred for 30 min, then suction-filtered, and finally washed to a conductivity of 6.25 μs/cm, and after drying, the temperature was raised to 400° C. in an air atmosphere for calcination for 5 h, to give a nitrogen-containing luminescent particle product. The emission spectrum is shown in FIG. 2, the excitation spectrum is shown in FIG. 3, and the X-ray diffraction pattern is shown in FIG. 4. The chemical composition of the oxygen poor zone of the nitrogen-containing luminescent particle is Ca.sub.0.1Sr.sub.0.89AlSiN.sub.3:0.01Eu, the chemical composition of the transition zone is Ca.sub.0.1Sr.sub.0.89AlSiO.sub.1.5N.sub.2:0.01Eu, with a thickness of 270 nm, and the chemical composition of the oxygen rich zone is Ca.sub.0.1Sr.sub.0.89AlSiO.sub.4.5:0.01Eu, with a thickness of 42 nm.

Example 4

[0071] 0.66 g of Ca.sub.3N.sub.2, 9.383 g of Sr.sub.3N.sub.2, 5.56 g of AlN, 5.202 g of Si.sub.3N.sub.4, and 0.196 g of Eu.sub.2O.sub.3 were weighted. These starting materials were thoroughly mixed in a nitrogen atmosphere for 3 h and charged into an Mo crucible, which was rapidly transferred to a tubular furnace, and then the temperature was gradually raised to 1700° C. under a nitrogen atmosphere for 12 h; the resulting nitrogen-containing luminescent particle was pulverized and sieved, the sieved nitrogen-containing luminescent particle was placed into deionized water and stirred for 30 min, then suction-filtered, and finally washed to a conductivity of 7.28 μs/cm, and after drying, the temperature was raised to 400° C. in an air atmosphere for calcination for 5 h, to give a nitrogen-containing luminescent particle product. The emission spectrum is shown in FIG. 2, the excitation spectrum is shown in FIG. 3, the luminescent intensity is shown in Table 1 and is higher than that in comparative example 1, the X-ray diffraction pattern is shown in FIG. 4, and the SEM picture is shown in FIG. 5. The chemical composition of the oxygen poor zone of the nitrogen-containing luminescent particle is Ca.sub.0.12Sr.sub.0.87AlSiN.sub.3:0.01Eu, the chemical composition of the transition zone is Ca.sub.0.12Sr.sub.0.87AlSiO.sub.1.35N.sub.2.1:0.01Eu, with a thickness of 360 nm, and the chemical composition of the oxygen rich zone is Ca.sub.0.12Sr.sub.0.87AlSi.sub.1.05O.sub.4.3N.sub.0.2:0.01Eu, with a thickness of 48 nm.

Comparative Example 1

[0072] 0.66 g of Ca.sub.3N.sub.2, 9.383 g of Sr.sub.3N.sub.2, 5.56 g of AlN, 5.202 g of Si.sub.3N.sub.4, and 0.196 g of Eu.sub.2O.sub.3 were weighted. These starting materials were thoroughly mixed in a nitrogen atmosphere for 3 h and charged into an Mo crucible, which was rapidly transferred to a tubular furnace, and then the temperature was gradually raised to 1700° C. under a nitrogen atmosphere for 12 h; the resulting nitrogen-containing luminescent particle was pulverized and sieved, the sieved nitrogen-containing luminescent particle was placed into deionized water and stirred for 30 min, then suction-filtered, and finally washed to a conductivity of 5.12 μs/cm, and after drying, a nitrogen-containing luminescent particle product was obtained. The emission spectrum is shown in FIG. 2, the excitation spectrum is shown in FIG. 3, the X-ray diffraction pattern is shown in FIG. 4, and the SEM picture is shown in FIG. 6. The chemical composition of the nitrogen-containing luminescent particle is Ca.sub.0.12Sr.sub.0.87AlSiN.sub.3: 0.01Eu.

[0073] The nitrogen-containing luminescent particles in the examples and the comparative example as described above were made into a luminescent device respectively, and the testing results show that the luminescent intensity and the aging properties of the comparative example 1 are lower than those of the examples 1-4, as shown in Table 1. The aging conditions are: SMD 2835 LED Lamp Bead, chip size 10×30 mil, chip band 452.5-455 nm, current 150 mA, power 0.5 W, ambient conditions: normal temperature and moisture.

TABLE-US-00001 TABLE 1 luminescent 1000 h aging intensity light decay ΔX ΔY Example 1 105 2.2% −0.006 0.005 Example 2 103 2.3% −0.007 0.005 Example 3 103 2.3% −0.007 0.006 Example 4 104 2.5% −0.01 0.008 Comparative example 1 100 4.1% −0.022 0.015

Example 5

[0074] 0.545 g of Ca.sub.3N.sub.2, 9.412 g of Sr.sub.3N.sub.2, 4.522 g of AlN, 5.133 g of Si.sub.3N.sub.4, and 0.388 g of Eu.sub.2O.sub.3 were weighted. These starting materials were thoroughly mixed in a nitrogen atmosphere for 2 h and charged into an Mo crucible, which was rapidly transferred to a tubular furnace, and then the temperature was gradually raised to 1800° C. under a nitrogen-argon mixture atmosphere for 10 h, and then the temperature was reduced to 350° C., and the air atmosphere was fed at a rate of 5 L/min for calcination for 6 h; the resulting nitrogen-containing luminescent particle was pulverized and sieved, the sieved nitrogen-containing luminescent particle was placed into deionized water and stirred for 30 min, then suction-filtered, and finally washed to a conductivity of 5.33 μs/cm, and after drying, a nitrogen-containing luminescent particle product was obtained. The chemical composition of the oxygen poor zone of the nitrogen-containing luminescent particle is Ca.sub.0.1Sr.sub.0.88AlSi.sub.0.995O.sub.0.02N.sub.2.98: 0.02Eu, the chemical composition of the transition zone is Ca.sub.0.1Sr.sub.0.88AlSiO.sub.0.9N.sub.2.4:0.02Eu, with a thickness of 450 nm, and the chemical composition of the oxygen rich zone is Ca.sub.0.1Sr.sub.0.88AlSiO.sub.4.5:0.02Eu, with a thickness of 24 nm.

Example 6

[0075] 0.447 g of Ca.sub.3N.sub.2, 11.3 g of Ba.sub.3N.sub.2, 3.706 g of AlN, 4.229 g of Si.sub.3N.sub.4, and 0.318 g of Eu.sub.2O.sub.3 were weighted. These starting materials were thoroughly mixed in a nitrogen atmosphere for 2 h and charged into an Mo crucible, which was rapidly transferred to a tubular furnace, and then the temperature was gradually raised to 1800° C. under a nitrogen-argon mixture atmosphere for 10 h, and then the temperature was reduced to 350° C., and the air atmosphere was fed at a rate of 5 L/min for calcination for 6h; the resulting nitrogen-containing luminescent particle was pulverized and sieved, the sieved nitrogen-containing luminescent particle was placed into deionized water and stirred for 30 min, then suction-filtered, and finally washed to a conductivity of 6.89 μs/cm, and after drying, a nitrogen-containing luminescent particle product was obtained. The chemical composition of the oxygen poor zone of the nitrogen-containing luminescent particle is Ca.sub.0.1Ba.sub.0.88AlSiN.sub.3:0.02Eu, the chemical composition of the transition zone is Ca.sub.0.1Ba.sub.0.88AlSiO.sub.0.9N.sub.2.4:0.02Eu, with a thickness of 200 nm, and the chemical composition of the oxygen rich zone is Ca.sub.0.1Ba.sub.0.88AlSi.sub.1.01O.sub.4.5, with a thickness of 32 nm.

Example 7

[0076] 0.547 g of Ca.sub.3N.sub.2, 9.442 g of Sr.sub.3N.sub.2, 4.309 g of AlN, 0.137 g of BN, 5.175 g of Si.sub.3N.sub.4, and 0.389 g of Eu.sub.2O.sub.3 were weighted. These starting materials were thoroughly mixed in a nitrogen atmosphere for 2 h and charged into an Mo crucible, which was rapidly transferred to a tubular furnace, and then the temperature was gradually raised to 1800° C. under a nitrogen-argon mixture atmosphere for 10 h, and then the temperature was reduced to 350° C., and the air atmosphere was fed at a rate of 5 L/min for calcination for 6h; the resulting nitrogen-containing luminescent particle was pulverized and sieved, the sieved nitrogen-containing luminescent particle was placed into deionized water and stirred for 30 min, then suction-filtered, and finally washed to a conductivity of 7.65 μs/cm, and after drying, a nitrogen-containing luminescent particle product was obtained. The chemical composition of the oxygen poor zone of the nitrogen-containing luminescent particle is Ca.sub.0.1Sr.sub.0.88Al.sub.0.95B.sub.0.05SiN.sub.3:0.02Eu, the chemical composition of the transition zone is Ca.sub.0.1Sr.sub.0.88Al.sub.0.95Bi.sub.0.05SiO.sub.1.2N.sub.2.2:0.02Eu, with a thickness of 360 nm, and the chemical composition of the oxygen rich zone is Ca.sub.0.2Sr.sub.0.78AlSiO.sub.4.5:0.02Eu, with a thickness of 50 nm.

Example 8

[0077] 0.538 g of Ca.sub.3N.sub.2, 9.291 g of Sr.sub.3N.sub.2, 4.24 g of AlN, 0.456 g of GaN, 5.092 g of Si.sub.3N.sub.4, and 0.383 g of Eu.sub.2O.sub.3 were weighted. These starting materials were thoroughly mixed in a nitrogen atmosphere for 2 h and charged into an Mo crucible, which was rapidly transferred to a tubular furnace, and then the temperature was gradually raised to 1800° C. under a nitrogen-argon mixture atmosphere for 10 h, and then the temperature was reduced to 350° C., and the air atmosphere was fed at a rate of 5 L/min for calcination for 6h; the resulting nitrogen-containing luminescent particle was pulverized and sieved, the sieved nitrogen-containing luminescent particle was placed into deionized water and stirred for 30 min, then suction-filtered, and finally washed to a conductivity of 7.65 μs/cm, and after drying, a nitrogen-containing luminescent particle product was obtained. The chemical composition of the oxygen poor zone of the nitrogen-containing luminescent particle is Ca.sub.0.1Sr.sub.0.88Al.sub.0.95Ga.sub.0.05SiN.sub.3:0.02Eu, the chemical composition of the transition zone is Ca.sub.0.1Sr.sub.0.88Al.sub.0.95Ga.sub.0.05SiO.sub.1.5N.sub.2:0.02Eu, with a thickness of 310 nm, and the chemical composition of the oxygen rich zone is Ca.sub.0.1Sr.sub.0.88Al.sub.0.95Ga.sub.0.05Si.sub.0.76O.sub.4, with a thickness of 50 nm.

Example 9

[0078] 0.556 g of Ca.sub.3N.sub.2, 9.05 g of Sr.sub.3N.sub.2, 0.131 g of Li.sub.3N, 4.609 of AlN, 5.259 g of Si.sub.3N.sub.4, and 0.396 g of Eu.sub.2O.sub.3 were weighted. These starting materials were thoroughly mixed in a nitrogen atmosphere for 2 h and charged into an Mo crucible, which was rapidly transferred to a tubular furnace, and then the temperature was gradually raised to 1800° C. under a nitrogen-argon mixture atmosphere for 10 h, and then the temperature was reduced to 350° C., and the air atmosphere was fed at a rate of 5 L/min for calcination for 6h; the resulting nitrogen-containing luminescent particle was pulverized and sieved, the sieved nitrogen-containing luminescent particle was placed into deionized water and stirred for 30 min, then suction-filtered, and finally washed to a conductivity of 9.12 s/cm, and after drying, a nitrogen-containing luminescent particle product was obtained. The chemical composition of the oxygen poor zone of the nitrogen-containing luminescent particle is Ca.sub.0.1Sr.sub.0.83Li.sub.0.1AlSiN.sub.3:0.02Eu, the chemical composition of the transition zone is Ca.sub.0.1Sr.sub.0.83Li.sub.0.1AlSi.sub.0.7O.sub.1.2N.sub.1.8:0.02Eu, with a thickness of 440 nm, and the chemical composition of the oxygen rich zone is Ca.sub.0.1Sr.sub.0.83Li.sub.0.1AlSi.sub.0.7O.sub.3.88, with a thickness of 25 nm.

Comparative Example 2

[0079] 0.544 g of Ca.sub.3N.sub.2, 9.4 g of Sr.sub.3N.sub.2, 4.516 g of AlN, 5.152 g of Si.sub.3N.sub.4, and 0.388 g of Eu.sub.2O.sub.3 were weighted. These starting materials were thoroughly mixed in a nitrogen atmosphere for 2 h and charged into an Mo crucible, which was rapidly transferred to a tubular furnace, and then the temperature was gradually raised to 1800° C. under a nitrogen-argon mixture atmosphere for 10 h; the resulting nitrogen-containing luminescent particle was pulverized and sieved, the sieved nitrogen-containing luminescent particle was placed into deionized water and stirred for 30 min, then suction-filtered, and finally washed to a conductivity of 5.77 μs/cm, to give a nitrogen-containing luminescent particle product. The chemical composition of the nitrogen-containing luminescent particle is Ca.sub.0.1Sr.sub.0.88AlSiN.sub.3:0.02Eu.

[0080] The nitrogen-containing luminescent particles in the examples and the comparative example as described above were made into a luminescent device respectively, and the testing results show that the luminescent intensity and the aging properties of the comparative example 2 are lower than those of the examples 5-9, as shown in Table 2. The aging conditions are: SMD 2835 LED Lamp Bead, chip size 10×30 mil, chip band 452.5-455 nm, current 150 mA, power 0.5 W, ambient conditions: normal temperature and moisture.

TABLE-US-00002 TABLE 2 luminescent 1000 h aging intensity light decay ΔX ΔY Example 5 105 2.5% −0.008 0.006 Example 6 104 2.6% −0.009 0.008 Example 7 105 2.7% −0.01 0.009 Example 8 103 2.6% −0.01 −0.01 Example 9 105 2.6% −0.009 −0.009 comparative example 2 100 4.3% −0.021 0.015

Example 10

[0081] 5.38 g of Ca.sub.3N.sub.2, 5.25 g of AlN, 5.989 g of Si.sub.3N.sub.4, and 3.381 g of Eu.sub.2O.sub.3 were weighted. These starting materials were thoroughly mixed in a nitrogen atmosphere for 3 h and charged into an Mo crucible, which was rapidly transferred to a tubular furnace, and then the temperature was gradually raised to 1850° C. under a nitrogen-argon mixture atmosphere for 12 h; the resulting nitrogen-containing luminescent particle was pulverized and sieved, the sieved nitrogen-containing luminescent particle was placed into deionized water and stirred for 30 min, then suction-filtered, and finally washed to a conductivity of 4.18 μs/cm, and after drying, the temperature was raised to 300° C. in a nitrogen-oxygen mixture atmosphere (in which the volume percent of oxygen is 10%) for calcination for 8 h, to give a nitrogen-containing luminescent particle product. The emission spectrum is shown in FIG. 1, and the thermal quenching spectrum is shown in FIG. 8. The chemical composition of the oxygen poor zone of the nitrogen-containing luminescent particle is Ca.sub.0.85AlSiN.sub.3:0.15Eu, the chemical composition of the transition zone is Ca.sub.0.85AlSiO.sub.1.5N.sub.2:0.15Eu, with a thickness of 230 nm, and the chemical composition of the oxygen rich zone is Ca.sub.0.85AlSiO.sub.4.5: 0.15Eu, with a thickness of 30 nm.

Example 11

[0082] 5.432 g of Ca.sub.3N.sub.2, 5.301 g of AlN, 6.047 g of Si.sub.3N.sub.4, and 3.219 g of EuN were weighted. These starting materials were thoroughly mixed in a nitrogen atmosphere for 3 h and charged into an Mo crucible, which was rapidly transferred to a tubular furnace, and then the temperature was gradually raised to 1850° C. under a nitrogen-argon mixture atmosphere for 12 h; the resulting nitrogen-containing luminescent particle was pulverized and sieved, the sieved nitrogen-containing luminescent particle was placed into deionized water and stirred for 30 min, then suction-filtered, and finally washed to a conductivity of 7.63 μs/cm, and after drying, the temperature was raised to 300° C. in a nitrogen-oxygen mixture atmosphere (in which the volume percent of oxygen is 10%) for calcination for 8 h, to give a nitrogen-containing luminescent particle product. The emission spectrum is shown in FIG. 1, and the thermal quenching spectrum is shown in FIG. 8. The chemical composition of the oxygen poor zone of the nitrogen-containing luminescent particle is Ca.sub.0.85AlSiN.sub.3:0.15Eu, the chemical composition of the transition zone is Ca.sub.0.85AlSi.sub.0.75ON.sub.2:0.15Eu, with a thickness of 290 nm, and the chemical composition of the oxygen rich zone is Ca.sub.0.85AlSi.sub.0.625O.sub.3.6N.sub.0.1:0.15Eu, with a thickness of 25 nm.

Example 12

[0083] 5.215 g of Ca.sub.3N.sub.2, 5.089 g of AlN, 5.805 g of Si.sub.3N.sub.4, and 3.891 g of EuF.sub.3 were weighted. These starting materials were thoroughly mixed in a nitrogen atmosphere for 3 h and charged into an Mo crucible, which was rapidly transferred to a tubular furnace, and then the temperature was gradually raised to 1850° C. under a nitrogen-argon mixture atmosphere for 12 h; the resulting nitrogen-containing luminescent particle was pulverized and sieved, the sieved nitrogen-containing luminescent particle was placed into deionized water and stirred for 30 min, then suction-filtered, and finally washed to a conductivity of 5.44 μs/cm, and after drying, the temperature was raised to 300° C. in a nitrogen-oxygen mixture atmosphere (in which the volume percent of oxygen is 10%) for calcination for 8 h, to give a nitrogen-containing luminescent particle product. The emission spectrum is shown in FIG. 1, and the thermal quenching spectrum is shown in FIG. 8. The chemical composition of the oxygen poor zone of the nitrogen-containing luminescent particle is Ca.sub.0.85AlSiN.sub.3:0.15Eu, the chemical composition of the transition zone is Ca.sub.0.85Al.sub.0.7SiO.sub.0.9N.sub.2.1:0.15Eu, with a thickness of 275 nm, and the chemical composition of the oxygen rich zone is Ca.sub.0.85Al.sub.0.8SiO.sub.4.2:0.15Eu, with a thickness of 16 nm.

Example 13

[0084] 4.985 g of Ca.sub.3N.sub.2, 4.865 g of AlN, 5.55 g of Si.sub.3N.sub.4, and 4.599 g of EuCl.sub.3 were weighted. These starting materials were thoroughly mixed in a nitrogen atmosphere for 3 h and charged into an Mo crucible, which was rapidly transferred to a tubular furnace, and then the temperature was gradually raised to 1850° C. under a nitrogen-argon mixture atmosphere for 12 h; the resulting nitrogen-containing luminescent particle was pulverized and sieved, the sieved nitrogen-containing luminescent particle was placed into deionized water and stirred for 30 min, then suction-filtered, and finally washed to a conductivity of 6.16 μs/cm, and after drying, the temperature was raised to 300° C. in a nitrogen-oxygen mixture atmosphere (in which the volume percent of oxygen is 10%) for calcination for 8 h, to give a nitrogen-containing luminescent particle product. The emission spectrum is shown in FIG. 7, and the thermal quenching spectrum is shown in FIG. 8. The chemical composition of the oxygen poor zone of the nitrogen-containing luminescent particle is Ca.sub.0.85AlSiN.sub.3:0.15Eu, the chemical composition of the transition zone is Ca.sub.0.85AlSiO.sub.1.2N.sub.2.2:0.15Eu, with a thickness of 365 nm, and the chemical composition of the oxygen rich zone is Ca.sub.0.85AlSiO.sub.4.5:0.15Eu, with a thickness of 42 nm.

Comparative Example 3

[0085] 5.38 g of Ca.sub.3N.sub.2, 5.25 g of AlN, 5.989 g of Si.sub.3N.sub.4, and 3.381 g of Eu.sub.2O.sub.3 were weighted. These starting materials were thoroughly mixed in a nitrogen atmosphere for 3 h and charged into an Mo crucible, which was rapidly transferred to a tubular furnace, and then the temperature was gradually raised to 1850° C. under a nitrogen-argon mixture atmosphere for 12 h; the resulting nitrogen-containing luminescent particle was pulverized and sieved, the sieved nitrogen-containing luminescent particle was placed into deionized water and stirred for 30 min, then suction-filtered, and finally washed to a conductivity of 6.35 μs/cm, and after drying, a nitrogen-containing luminescent particle product was obtained. The emission spectrum is shown in FIG. 7, and the thermal quenching spectrum is shown in FIG. 8. The chemical composition of the nitrogen-containing luminescent particle is Ca.sub.0.85AlSiN.sub.3: 0.15Eu.

[0086] The nitrogen-containing luminescent particles in the examples and the comparative example as described above were made into a luminescent device respectively, and the testing results show that the luminescent intensity and the aging properties of the comparative example 3 are lower than those of the examples 10-13, as shown in Table 3. The aging conditions are: SMD 2835 LED Lamp Bead, chip size 10×30 mil, chip band 452.5-455 nm, current 150 mA, power 0.5 W, ambient conditions: normal temperature and moisture.

TABLE-US-00003 TABLE 3 luminescent 1000 h aging intensity light decay ΔX ΔY Example 10 103 3.8% −0.018 0.011 Example 11 102 3.9% −0.019 0.011 Example 12 103 3.8% −0.016 0.009 Example 13 104 3.6% −0.016 0.01 comparative example 3 100 5.0% −0.03 0.025

Example 14

[0087] 7.191 g of Ca.sub.3N.sub.2, 6.812 g of Si.sub.3N.sub.4, 5.971 g of AlN, and 0.026 g of Eu.sub.2O.sub.3 were weighted. These starting materials were thoroughly mixed in a nitrogen atmosphere for 1 h and charged into an Mo crucible, which was rapidly transferred to a tubular furnace, and then the temperature was gradually raised to 1820° C. under a nitrogen atmosphere for 8 h; the resulting nitrogen-containing luminescent particle was pulverized and sieved, the sieved nitrogen-containing luminescent particle was placed into deionized water and stirred for 30 min, then suction-filtered, and finally washed to a conductivity of 3.27 μs/cm, and after drying, the temperature was raised to 200° C. in a nitrogen-oxygen mixture atmosphere (in which the volume percent of oxygen is 5%) for calcination for 15 h, to give a nitrogen-containing luminescent particle product. The chemical composition of the oxygen poor zone of the nitrogen-containing luminescent particle is Ca.sub.0.999AlSiN.sub.3:0.001Eu, the chemical composition of the transition zone is Ca.sub.0.999AlSi.sub.0.75ON.sub.2:0.001Eu, with a thickness of 330 nm, and the chemical composition of the oxygen rich zone is Ca.sub.0.999AlSi.sub.0.75O.sub.4:0.001Eu, with a thickness of 42 nm.

Example 15

[0088] 7.068 g of Ca.sub.3N.sub.2, 6.756 g of Si.sub.3N.sub.4, 5.922 g of AlN, and 0.254 g of Eu.sub.2O.sub.3 were weighted. These starting materials were thoroughly mixed in a nitrogen atmosphere for 1 h and charged into an Mo crucible, which was rapidly transferred to a tubular furnace, and then the temperature was gradually raised to 1820° C. under a nitrogen atmosphere for 8 h; the resulting nitrogen-containing luminescent particle was pulverized and sieved, the sieved nitrogen-containing luminescent particle was placed into deionized water and stirred for 30 min, then suction-filtered, and finally washed to a conductivity of 5.61 μs/cm, and after drying, the temperature was raised to 200° C. in a nitrogen-oxygen mixture atmosphere (in which the volume percent of oxygen is 5%) for calcination for 15 h, to give a nitrogen-containing luminescent particle product. The emission spectrum is shown in FIG. 9. The chemical composition of the oxygen poor zone of the nitrogen-containing luminescent particle is Ca.sub.0.99AlSiN.sub.3:0.01Eu, the chemical composition of the transition zone is Ca.sub.0.99AlSiO.sub.1.2N.sub.2.2:0.01Eu, with a thickness of 385 nm, and the chemical composition of the oxygen rich zone is Ca.sub.0.99AlSiO.sub.4.5:0.01Eu, with a thickness of 32 nm.

Example 16

[0089] 6.543 g of Ca.sub.3N.sub.2, 6.517 g of Si.sub.3N.sub.4, 5.713 g of AlN, and 1.226 g of Eu.sub.2O.sub.3 were weighted. These starting materials were thoroughly mixed in a nitrogen atmosphere for 1 h and charged into an Mo crucible, which was rapidly transferred to a tubular furnace, and then the temperature was gradually raised to 1820° C. under a nitrogen atmosphere for 8 h; the resulting nitrogen-containing luminescent particle was pulverized and sieved, the sieved nitrogen-containing luminescent particle was placed into deionized water and stirred for 30 min, then suction-filtered, and finally washed to a conductivity of 6.95 μs/cm, and after drying, the temperature was raised to 200° C. in a nitrogen-oxygen mixture atmosphere (in which the volume percent of oxygen is 5%) for calcination for 15 h, to give a nitrogen-containing luminescent particle product. The emission spectrum is shown in FIG. 9. The chemical composition of the oxygen poor zone of the nitrogen-containing luminescent particle is Ca.sub.0.95AlSiN.sub.3:0.05Eu, the chemical composition of the transition zone is Ca.sub.0.95AlSi.sub.0.775O.sub.0.9N.sub.2.1:0.05Eu, with a thickness of 360 nm, and the chemical composition of the oxygen rich zone is Ca.sub.0.95AlSi.sub.0.725O.sub.3.9, with a thickness of 27 nm.

Example 17

[0090] 5.937 g of Ca.sub.3N.sub.2, 6.242 g of Si.sub.3N.sub.4, 5.472 g of AlN, and 2.349 g of Eu.sub.2O.sub.3 were weighted. These starting materials were thoroughly mixed in a nitrogen atmosphere for 1 h and charged into an Mo crucible, which was rapidly transferred to a tubular furnace, and then the temperature was gradually raised to 1820° C. under a nitrogen atmosphere for 8 h; the resulting nitrogen-containing luminescent particle was pulverized and sieved, the sieved nitrogen-containing luminescent particle was placed into deionized water and stirred for 30 min, then suction-filtered, and finally washed to a conductivity of 5.14 μs/cm, and after drying, the temperature was raised to 200° C. in a nitrogen-oxygen mixture atmosphere (in which the volume percent of oxygen is 5%) for calcination for 15 h, to give a nitrogen-containing luminescent particle product. The emission spectrum is shown in FIG. 9. The chemical composition of the oxygen poor zone of the nitrogen-containing luminescent particle is Ca.sub.0.9AlSiN.sub.3:0.1Eu, the chemical composition of the transition zone is Ca.sub.0.9AlSiO.sub.1.5N.sub.2:0.1Eu, with a thickness of 440 nm, and the chemical composition of the oxygen rich zone is Ca.sub.0.9AlSiO.sub.4.5:0.1Eu, with a thickness of 28 nm.

Example 18

[0091] 4.866 g of Ca.sub.3N.sub.2, 5.756 g of Si.sub.3N.sub.4, 5.045 g of AlN, and 4.332 g of Eu.sub.2O.sub.3 were weighted. These starting materials were thoroughly mixed in a nitrogen atmosphere for 1 h and charged into an Mo crucible, which was rapidly transferred to a tubular furnace, and then the temperature was gradually raised to 1820° C. under a nitrogen atmosphere for 8 h; the resulting nitrogen-containing luminescent particle was pulverized and sieved, the sieved nitrogen-containing luminescent particle was placed into deionized water and stirred for 30 min, then suction-filtered, and finally washed to a conductivity of 8.22 μs/cm, and after drying, the temperature was raised to 200° C. in a nitrogen-oxygen mixture atmosphere (in which the volume percent of oxygen is 5%) for calcination for 15 h, to give a nitrogen-containing luminescent particle product. The emission spectrum is shown in FIG. 9. The chemical composition of the oxygen poor zone of the nitrogen-containing luminescent particle is Ca.sub.0.8AlSiN.sub.3:0.2Eu, the chemical composition of the transition zone is Ca.sub.0.8AlSi.sub.0.725O.sub.1.1N.sub.1.9:0.2Eu, with a thickness of 345 nm, and the chemical composition of the oxygen rich zone is Ca.sub.0.8AlSi.sub.1.075O.sub.4.2N.sub.0.3: 0.2Eu, with a thickness of 40 nm.

Comparative Example 4

[0092] 4.866 g of Ca.sub.3N.sub.2, 5.756 g of Si.sub.3N.sub.4, 5.045 g of AlN, and 4.332 g of Eu.sub.2O.sub.3 were weighted. These starting materials were thoroughly mixed in a nitrogen atmosphere for 1 h and charged into an Mo crucible, which was rapidly transferred to a tubular furnace, and then the temperature was gradually raised to 1820° C. under a nitrogen atmosphere for 8 h; the resulting nitrogen-containing luminescent particle was pulverized and sieved, the sieved nitrogen-containing luminescent particle was placed into deionized water and stirred for 30 min, then suction-filtered, and finally washed to a conductivity of 6.11 μs/cm, and after drying, a nitrogen-containing luminescent particle product was obtained. The emission spectrum is shown in FIG. 9. The chemical composition of the nitrogen-containing luminescent particle is Ca.sub.0.8AlSiN.sub.3:0.2Eu.

[0093] The nitrogen-containing luminescent particles in the examples and the comparative example as described above were made into a luminescent device respectively, and the testing results show that the luminescent intensity and the aging properties of the comparative example 4 are lower than those of the examples 14-18, as shown in Table 4. The aging conditions are: SMD 2835 LED Lamp Bead, chip size 10×30 mil, chip band 452.5-455 nm, current 150 mA, power 0.5 W, ambient conditions: normal temperature and moisture.

TABLE-US-00004 TABLE 4 luminescent 1000 h aging intensity light decay ΔX ΔY Example 14 120 2.1% −0.01 0.008 Example 15 128 2.3% −0.01 0.007 Example 16 118 2.9% −0.012 0.01 Example 17 110 3.3% −0.015 0.013 Example 18 102 4.0% −0.022 0.016 comparative example 4 100 6.5% −0.035 0.025

Example 19

[0094] 0.803 g of Ca.sub.3N.sub.2, 7.98 g of Sr.sub.3N.sub.2, 4.439 g of AlN, 5.064 g of Si.sub.3N.sub.4, and 1.715 g of Eu.sub.2O.sub.3 were weighted. These starting materials were thoroughly mixed in a nitrogen atmosphere for 4 h and charged into an Mo crucible, which was rapidly transferred to a tubular furnace, and then the temperature was gradually raised to 1780° C. under a nitrogen-argon mixture atmosphere for 9 h, and then the temperature was reduced to 320° C., and a nitrogen-oxygen mixture atmosphere (in which the volume percent of oxygen is 7%) was fed at a rate of 3 L/min for calcination for 8h; the resulting nitrogen-containing luminescent particle was pulverized and sieved, the sieved nitrogen-containing luminescent particle was placed into deionized water and stirred for 30 min, then suction-filtered, and finally washed to a conductivity of 5.18 μs/cm, and after drying, a nitrogen-containing luminescent particle product was obtained. The thermal quenching spectrum is shown in FIG. 10. The oxygen poor zone of the nitrogen-containing luminescent particle is Ca.sub.0.15Sr.sub.0.76AlSiN.sub.3:0.09Eu, the transition zone is Ca.sub.0.15Sr.sub.0.76AlSi.sub.0.8O.sub.0.8N.sub.2.2:0.09Eu, with a thickness of 220 nm, and the oxygen rich zone is Ca.sub.0.15Sr.sub.0.76AlSi.sub.0.825O.sub.4N.sub.0.1:0.09Eu, with a thickness of 29 nm.

Example 20

[0095] 0.805 g of Ca.sub.3N.sub.2, 8.002 g of Sr.sub.3N.sub.2, 4.317 g of AlN, 0.332 g of Al.sub.2O.sub.3, 4.824 g of Si.sub.2N.sub.3, and 1.72 g of Eu.sub.2O.sub.3 were weighted. These starting materials were thoroughly mixed in a nitrogen atmosphere for 4 h and charged into an Mo crucible, which was rapidly transferred to a tubular furnace, and then the temperature was gradually raised to 1780° C. under a nitrogen-argon mixture atmosphere for 9 h, and then the temperature was reduced to 320° C., and a nitrogen-oxygen mixture atmosphere (in which the volume percent of oxygen is 7%) was fed at a rate of 3 L/min for calcination for 8h; the resulting nitrogen-containing luminescent particle was pulverized and sieved, the sieved nitrogen-containing luminescent particle was placed into deionized water and stirred for 30 min, then suction-filtered, and finally washed to a conductivity of 6.25 μs/cm, and after drying, a nitrogen-containing luminescent particle product was obtained. The thermal quenching spectrum is shown in FIG. 10. The chemical composition of the oxygen poor zone of the nitrogen-containing luminescent particle is Ca.sub.0.15Sr.sub.0.76AlSi.sub.0.95O.sub.0.2N.sub.2.8:0.09Eu, the chemical composition of the transition zone is Ca.sub.0.15Sr.sub.0.76AlSi.sub.0.85O.sub.0.6N.sub.2.4:0.09Eu, with a thickness of 360 nm, and the chemical composition of the oxygen rich zone is Ca.sub.0.15Sr.sub.0.76AlSi.sub.0.81O.sub.4N.sub.0.08:0.09Eu, with a thickness of 49 nm.

Example 21

[0096] 0.798 g of Ca.sub.3N.sub.2, 7.932 g of Sr.sub.3N.sub.2, 4.412 g of AlN, 4.858 g of Si.sub.3N.sub.4, 0.295 g of SiO.sub.2, and 1.705 g of Eu.sub.2O.sub.3 were weighted. These starting materials were thoroughly mixed in a nitrogen atmosphere for 4 h and charged into an Mo crucible, which was rapidly transferred to a tubular furnace, and then the temperature was gradually raised to 1780° C. under a nitrogen-argon mixture atmosphere for 9 h, and then the temperature was reduced to 320° C., and a nitrogen-oxygen mixture atmosphere (in which the volume percent of oxygen is 7%) was fed at a rate of 3 L/min for calcination for 8h; the resulting nitrogen-containing luminescent particle was pulverized and sieved, the sieved nitrogen-containing luminescent particle was placed into deionized water and stirred for 30 min, then suction-filtered, and finally washed to a conductivity of 5.26 μs/cm, and after drying, a nitrogen-containing luminescent particle product was obtained. The thermal quenching spectrum is shown in FIG. 10. The chemical composition of the oxygen poor zone of the nitrogen-containing luminescent particle is Ca.sub.0.15Sr.sub.0.76AlSi.sub.0.975O.sub.0.1N.sub.2.9:0.09Eu, the chemical composition of the transition zone is Ca.sub.0.15Sr.sub.0.76AlSi.sub.0.8O.sub.0.8N.sub.2.2:0.09Eu, with a thickness of 340 nm, and the chemical composition of the oxygen rich zone is Ca.sub.0.15Sr.sub.0.76AlSi.sub.0.85O.sub.4.2:0.09Eu, with a thickness of 29 nm.

Comparative Example 5

[0097] 0.803 g of Ca.sub.3N.sub.2, 7.98 g of Sr.sub.3N.sub.2, 4.439 g of AlN, 5.064 g of Si.sub.3N.sub.4, and 1.715 g of Eu.sub.2O.sub.3 were weighted. These starting materials were thoroughly mixed in a nitrogen atmosphere for 4 h and charged into an Mo crucible, which was rapidly transferred to a tubular furnace, and then the temperature was gradually raised to 1780° C. under a nitrogen-argon mixture atmosphere for 9 h; the resulting nitrogen-containing luminescent particle was pulverized and sieved, the sieved nitrogen-containing luminescent particle was placed into deionized water and stirred for 30 min, then suction-filtered, and finally washed to a conductivity of 6.87 μs/cm, and after drying, a nitrogen-containing luminescent particle product was obtained. The thermal quenching spectrum is shown in FIG. 10. The chemical composition of the nitrogen-containing luminescent particle is Ca.sub.0.15Sr.sub.0.76AlSiN.sub.3:0.09Eu.

[0098] The nitrogen-containing luminescent particles in the examples and the comparative example as described above were made into a luminescent device respectively, and the testing results show that the luminescent intensity and the aging properties of the comparative example 5 are lower than those of the examples 19-21, as shown in Table 5. The aging conditions are: SMD 2835 LED Lamp Bead, chip size 10×30 mil, chip band 452.5-455 nm, current 150 mA, power 0.5 W, ambient conditions: normal temperature and moisture.

TABLE-US-00005 TABLE 5 luminescent 1000 h aging intensity light decay ΔX ΔY Example 19 104 3.0% −0.015 0.012 Example 20 102 3.2% −0.014 0.011 Example 21 103 3.2% −0.015 0.012 comparative example 5 100 6.5% −0.028 0.022

Example 22

[0099] 7.025 g of Ca.sub.3N.sub.2, 5.903 g of AlN, 6.735 g of Si.sub.3N.sub.4, 0.203 g of Eu.sub.2O.sub.3, and 0.134 g of Dy.sub.2O.sub.3 were weighted. These starting materials were thoroughly mixed in a nitrogen atmosphere for 3 h and charged into an Mo crucible, which was rapidly transferred to a tubular furnace, and then the temperature was gradually raised to 1880° C. under a nitrogen atmosphere for 12 h; the resulting nitrogen-containing luminescent particle was pulverized and sieved, the sieved nitrogen-containing luminescent particle was placed into deionized water and stirred for 30 min, then suction-filtered, and finally washed to a conductivity of 4.56 μs/cm, and after drying, the temperature was raised to 280° C. in a nitrogen-oxygen mixture atmosphere (in which the volume percent of oxygen is 8%) for calcination for 10 h, to give a nitrogen-containing luminescent particle product. The chemical composition of the oxygen poor zone of the nitrogen-containing luminescent particle is Ca.sub.0.987AlSiN.sub.3:0.008Eu, 0.005Dy, the chemical composition of the transition zone is Ca.sub.0.987AlSi.sub.0.8O.sub.0.8N.sub.2.2:0.008Eu, 0.005Dy, with a thickness of 390 nm, and the chemical composition of the oxygen rich zone is Ca.sub.0.987AlSi.sub.0.8O.sub.4.1:0.008Eu, 0.005Dy, with a thickness of 28 nm.

Example 23

[0100] 7.032 g of Ca.sub.3N.sub.2, 5.909 g of AlN, 6.741 g of Si.sub.3N.sub.4, 0.203 g of Eu.sub.2O.sub.3, and 0.115 g of Lu.sub.2O.sub.3 were weighted. These starting materials were thoroughly mixed in a nitrogen atmosphere for 3 h and charged into an Mo crucible, which was rapidly transferred to a tubular furnace, and then the temperature was gradually raised to 1880° C. under a nitrogen atmosphere for 12 h; the resulting nitrogen-containing luminescent particle was pulverized and sieved, the sieved nitrogen-containing luminescent particle was placed into deionized water and stirred for 30 min, then suction-filtered, and finally washed to a conductivity of 5.66 μs/cm, and after drying, the temperature was raised to 280° C. in a nitrogen-oxygen mixture atmosphere (in which the volume percent of oxygen is 8%) for calcination for 10 h, to give a nitrogen-containing luminescent particle product. The chemical composition of the oxygen poor zone of the nitrogen-containing luminescent particle is Ca.sub.0.988AlSiN.sub.3:0.008Eu, 0.004Lu, the chemical composition of the transition zone is Ca.sub.0.988AlSiO.sub.0.9N.sub.2.4:0.008Eu, 0.004Lu, with a thickness of 465 nm, and the chemical composition of the oxygen rich zone is Ca.sub.0.988AlSiO.sub.4.5:0.008Eu, 0.004Lu, with a thickness of 38 nm.

Example 24

[0101] 7.034 g of Ca.sub.3N.sub.2, 5.911 g of AlN, 6.743 g of Si.sub.3N.sub.4, 0.203 g of Eu.sub.2O.sub.3, and 0.109 g of Ho.sub.2O.sub.3 were weighted. These starting materials were thoroughly mixed in a nitrogen atmosphere for 3 h and charged into an Mo crucible, which was rapidly transferred to a tubular furnace, and then the temperature was gradually raised to 1880° C. under a nitrogen atmosphere for 12 h; the resulting nitrogen-containing luminescent particle was pulverized and sieved, the sieved nitrogen-containing luminescent particle was placed into deionized water and stirred for 30 min, then suction-filtered, and finally washed to a conductivity of 3.87 μs/cm, and after drying, the temperature was raised to 280° C. in a nitrogen-oxygen mixture atmosphere (in which the volume percent of oxygen is 8%) for calcination for 10 h, to give a nitrogen-containing luminescent particle product. The chemical composition of the oxygen poor zone of the nitrogen-containing luminescent particle is Ca.sub.0.988AlSiN.sub.3:0.008Eu, 0.004Ho, the chemical composition of the transition zone is Ca.sub.0.988AlSi.sub.0.875O.sub.0.5N.sub.2.5:0.008Eu, 0.004Ho, with a thickness of 390 nm, and the chemical composition of the oxygen rich zone is Ca.sub.0.988AlSi.sub.0.65O.sub.3.8:0.008Eu, 0.004Ho, with a thickness of 37 nm.

Example 25

[0102] 7.033 g of Ca.sub.3N.sub.2, 5.91 g of AlN, 6.743 g of Si.sub.3N.sub.4, 0.203 g of Eu.sub.2O.sub.3, and 0.111 g of Ho.sub.2O.sub.3 were weighted. These starting materials were thoroughly mixed in a nitrogen atmosphere for 3 h and charged into an Mo crucible, which was rapidly transferred to a tubular furnace, and then the temperature was gradually raised to 1880° C. under a nitrogen atmosphere for 12 h; the resulting nitrogen-containing luminescent particle was pulverized and sieved, the sieved nitrogen-containing luminescent particle was placed into deionized water and stirred for 30 min, then suction-filtered, and finally washed to a conductivity of 4.89 μs/cm, and after drying, the temperature was raised to 280° C. in a nitrogen-oxygen mixture atmosphere (in which the volume percent of oxygen is 8%) for calcination for 10 h, to give a nitrogen-containing luminescent particle product. The chemical composition of the oxygen poor zone of the nitrogen-containing luminescent particle is Ca.sub.0.987AlSiN.sub.3:0.008Eu, 0.005Ce, the chemical composition of the transition zone is Ca.sub.0.987AlSiO.sub.1.2N.sub.2.2:0.008Eu, 0.005Ce, with a thickness of 350 nm, and the chemical composition of the oxygen rich zone is Ca.sub.0.987AlSiO.sub.4.5:0.008Eu, 0.005Ce, with a thickness of 15 nm.

Comparative Example 6

[0103] 7.095 g of Ca.sub.3N.sub.2, 5.933 g of AlN, 6.768 g of Si.sub.3N.sub.4, and 0.204 g of Eu.sub.2O.sub.3 were weighted. These starting materials were thoroughly mixed in a nitrogen atmosphere for 3 h and charged into an Mo crucible, which was rapidly transferred to a tubular furnace, and then the temperature was gradually raised to 1880° C. under a nitrogen atmosphere for 12 h; the resulting nitrogen-containing luminescent particle was pulverized and sieved, the sieved nitrogen-containing luminescent particle was placed into deionized water and stirred for 30 min, then suction-filtered, and finally washed to a conductivity of 5.58 μs/cm, and after drying, a nitrogen-containing luminescent particle product was obtained. The chemical composition of the nitrogen-containing luminescent particle is Ca.sub.0.992AlSiN.sub.3:0.008Eu.

[0104] The nitrogen-containing luminescent particles in the examples and the comparative example as described above were made into a luminescent device respectively, and the testing results show that the luminescent intensity and the aging properties of the comparative example 6 are lower than those of the examples 22-25, as shown in Table 6. The aging conditions are: SMD 2835 LED Lamp Bead, chip size 10×30 mil, chip band 452.5-455 nm, current 150 mA, power 0.5 W, ambient conditions: normal temperature and moisture.

TABLE-US-00006 TABLE 6 luminescent 1000 h aging intensity light decay ΔX ΔY Example 22 103 2.3% −0.009 0.008 Example 23 101 2.5% −0.01 0.009 Example 24 104 2.5% −0.01 0.008 Example 25 102 2.4% −0.008 0.007 comparative example 6 100 3.8% −0.02 0.016

[0105] The contents not specifically described in the specific embodiments of the present invention are known in the art and may be implemented with reference to known techniques.

[0106] The present invention has been verified via repeated tests, and satisfactory test results are achieved.

[0107] The specific embodiments and examples above are provided to support the technical concepts of a nitrogen-containing luminescent particle and method for preparing a same, a nitrogen-containing illuminant, and a luminescent device of the present invention, and are not intended to limit the scope of protection of the present invention. Any equivalent modification or variations made based on the present technical solution following the technical concepts of the present invention, all fall within the scope of protection of the present invention.