MICROWAVE FERRITE MATERIAL SUITABLE FOR 5G RADIO FREQUENCY DEVICE AND PREPARATION METHOD THEREFOR

Abstract

Disclosed are a microwave ferrite material suitable for a 5G radio frequency device and a preparation method therefor. The preparation raw materials of the microwave ferrite material comprise a first microwave ferrite material and a second microwave ferrite material. In the microwave ferrite material provided by the present application, a double-component formula is introduced, proper ion substitution is employed, and ball milling and sintering processes are controlled, and therefore, the prepared microwave ferrite material has the characteristics of high saturation magnetic moment, high Curie temperature, narrow linewidth and low loss, and can be applied to industrial large-scale production of 5G radio frequency devices.

Claims

1. A microwave ferrite material for a 5G radio frequency device, wherein raw materials for preparing the microwave ferrite material comprise a first microwave ferrite material and a second microwave ferrite material; the first microwave ferrite material is: Y.sub.(3ab)Bi.sub.aCa.sub.bFe.sub.(5cdef)Nb.sub.cZr.sub.dIn.sub.eMn.sub.fO.sub.12, wherein 0<a0.5, 0<b<1.2, 0<c0.3, 0<d0.6, 0<e0.6, and 0<f0.6, and b=2c+df; the second microwave ferrite material is: Y.sub.(3gh)Gd.sub.gCa.sub.hFe.sub.(5ijkn)V.sub.iGe.sub.jIn.sub.kTi.sub.nO.sub.12, wherein 0<g0.5, 0<h1.8, 0<i0.3, 0<j0.6, 0<k0.6, and 0<n0.6, and h=2i+j+n.

2. The microwave ferrite material according to claim 1, wherein a mass ratio of the first microwave ferrite material to the second microwave ferrite material is (0.5-2):1.

3. A preparation method for the microwave ferrite material according to claim 1, comprising the following steps: (1) mixing the first microwave ferrite material and the second microwave ferrite material in formula proportions, and performing wet ball milling, so as to obtain a mixture; (2) subjecting the mixture obtained in step (1) to drying, sieving, and granulation sequentially to obtain a ferrite powder; and (3) subjecting the ferrite powder obtained in step (2) to molding and sintering sequentially to obtain the microwave ferrite material for a 5G radio frequency device.

4. The preparation method according to claim 3, wherein a mass ratio of the powder to grinding balls to a grinding aid in the wet ball milling in step (1) is 1:(1-5):(0.6-2.5).

5. The preparation method according to claim 3, wherein the wet ball milling in step (1) is performed for a period of 15-25 h.

6. The preparation method according to claim 3, wherein the wet ball milling in step (1) is performed at a rotational speed of 30-70 r/min.

7. The preparation method according to claim 4, wherein the grinding balls comprise zirconium balls and/or steel balls; preferably, the grinding aid comprises any one or a combination of at least two of deionized water, ethanol, acetone, n-propanol, or aqueous ammonia.

8. The preparation method according to claim 3, wherein the mixture in step (1) has a particle size range: D50: 0.005-2 m, D90: 0.05-4 m, and D99: 0.05-4 m.

9. The preparation method according to claim 3, wherein the drying in step (2) is performed at a temperature of 110-130 C.; preferably, the drying in step (2) is stopped when a moisture content is reduced to 0.05-5%; preferably, the granulation in step (2) is: mixing a sieved mixture with a binder and then performing sieving under a pressure to obtain the ferrite powder; preferably, a mass of the binder is 5-15 wt % of a mass of the mixture; preferably, the binder comprises an aqueous solution of polyvinyl alcohol; preferably, a mass fraction of polyvinyl alcohol is 5-20 wt % in the aqueous solution of polyvinyl alcohol; preferably, the pressure is 300-1200 kg/cm.sup.2; preferably, the sieving is performed with a screen of 30-100 mesh.

10. The preparation method according to claim 3, wherein the molding in step (3) has a density of 3-4 g/cm.sup.3; preferably, a blank of the molding in step (3) comprises a cylinder or a cube.

11. The preparation method according to claim 3, wherein the first microwave ferrite material in step (1) is prepared by the following method: (a) mixing a first raw material in formula proportions, and performing wet ball milling to obtain a mixture; and (b) subjecting the mixture obtained in step (a) to drying, sieving, and pre-sintering sequentially to obtain the first microwave ferrite material; preferably, a mass ratio of the first raw material to grinding balls to a grinding aid to a dispersant in the wet ball milling in step (a) is 1:(1-5):(0.6-2.5):(0.003-0.01).

12. The preparation method according to claim 11, wherein the wet ball milling in step (a) is performed for a period of 15-25 h; preferably, the wet ball milling in step (a) is performed at a rotational speed of 30-70 r/min; preferably, the first raw material in step (a) comprises Y.sub.2O.sub.3, CaCO.sub.3, Fe.sub.2O.sub.3, ZrO.sub.2, MnCO.sub.3, InO.sub.2, Bi.sub.2O.sub.3, and Nb.sub.2O.sub.5; preferably, the grinding balls comprise zirconium balls and/or steel balls; preferably, the grinding aid comprises any one or a combination of at least two of deionized water, ethanol, acetone, n-propanol, or aqueous ammonia; preferably, the dispersant comprises ammonium citrate and/or aqueous ammonia.

13. The preparation method according to claim 3, wherein the second microwave ferrite material in step (1) is prepared by the following method: (I) mixing a second raw material in formula proportions, and performing wet ball milling to obtain a mixture; and (II) subjecting the mixture obtained in step (I) to drying, sieving, and pre-sintering sequentially to obtain the second microwave ferrite material.

14. The preparation method according to claim 3, wherein the preparation method comprises the following steps: (1) mixing the first microwave ferrite material and the second microwave ferrite material in formula proportions, and performing wet ball milling at 30-70 r/min for 15-25 h, so as to obtain a mixture; a mass ratio of powder material to grinding balls to a grinding aid in the wet ball milling is 1:(1-5):(0.6-2.5); the mixture obtained has a particle size range: D50: 0.005-2 m, D90: 0.05-4 m, and D99: 0.05-4 m; (2) drying the mixture obtained in step (1) at 110-130 C. until a moisture content is reduced to 0.05-5%, sieving and then granulating; the granulation is: mixing a sieved mixture with a binder, and then performing sieving under a pressure of 300-1200 kg/cm.sup.2 with a screen of 30-100 mesh to obtain a ferrite powder; and (3) subjecting the ferrite powder obtained in step (2) to molding and sintering sequentially to obtain the microwave ferrite material for a 5G radio frequency device; the molding has a density of 3-4 g/cm.sup.3; the sintering is: heating to 1300-1500 C. at a heating rate of 2-5 C./min and holding for 6-20 h; for the sintering, an oxygen introduction is started 1-6 h before the temperature holding ends; for the sintering, the oxygen introduction is stopped when the temperature is 100-500 C. lower than the sintering temperature; the first microwave ferrite material in step (1) is prepared by the following method: (a) mixing a first raw material in formula proportions, and performing wet ball milling at 20-80 r/min for 10-40 h to obtain a mixture; a mass ratio of the first raw material to grinding balls to a grinding aid to a dispersant in the wet ball milling is 1:(1-5):(0.6-2.5):(0.003-0.01); the mixture has a particle size range: D50: 0.005-2 m, D90: 0.05-4 m, and D99: 0.05-4 m; and (b) drying the mixture obtained in step (a) at 110-130 C. until a moisture content is reduced to 0.05-5%, sieving, and then heating to 560-1100 C. at 1-2 C./min to perform pre-sintering and holding for 2-12 h, so as to obtain the first microwave ferrite material; for the pre-sintering, an oxygen introduction is started when the temperature reaches the pre-sintering temperature; for the pre-sintering, the oxygen introduction is stopped when the temperature is 100-200 C. lower than the pre-sintering temperature; the second microwave ferrite material in step (1) is prepared by the following method: (I) mixing a second raw material in formula proportions, and performing wet ball milling at 20-80 r/min for 10-40 h to obtain a mixture; a mass ratio of the second raw material to grinding balls to a grinding aid to a dispersant in the wet ball milling is 1:(1-5):(0.6-2.5):(0.003-0.01); the mixture has a particle size range: D50: 0.005-2 m, D90: 0.05-4 m, and D99: 0.05-4 m; and (II) drying the mixture obtained in step (I) at 110-130 C. until a moisture content is reduced to 0.05-5%, sieving, and then heating to 560-1100 C. at 1-2 C./min to perform pre-sintering and holding for 2-12 h, so as to obtain the second microwave ferrite material; for the pre-sintering, an oxygen introduction is started when the temperature reaches the pre-sintering temperature; for the pre-sintering, the oxygen introduction is stopped when the temperature is 100-200 C. lower than the pre-sintering temperature.

15. The preparation method according to claim 3, wherein the sintering in step (3) is: heating to 1300-1500 C. at a heating rate of 2-5 C./min and holding for 6-20 h.

16. The preparation method according to claim 3, wherein for the sintering in step (3), an oxygen introduction is started 1-6 h before the temperature holding ends; preferably, for the sintering in step (3), the oxygen introduction is stopped when the temperature is 100-500 C. lower than the sintering temperature.

17. The preparation method according to claim 11, wherein the mixture in step (a) has a particle size range: D50: 0.005-2 m, D90: 0.05-4 m, and D99: 0.05-4 m; preferably, the drying in step (b) is performed at a temperature of 110-130 C.; preferably, the drying in step (b) is stopped when a moisture content is reduced to 0.05-5%.

18. The preparation method according to claim 11, wherein the pre-sintering in step (b) is: heating to 560-1100 C. at a heating rate of 1-2 C./min and holding for 2-12 h; preferably, for the pre-sintering in step (b), an oxygen introduction is started when the temperature reaches the pre-sintering temperature; preferably, for the pre-sintering in step (b), the oxygen introduction is stopped when the temperature is 100-200 C. lower than the pre-sintering temperature.

19. The preparation method according to claim 13, wherein a mass ratio of the second raw material to grinding balls to a grinding aid to a dispersant in the wet ball milling in step (I) is 1:(1-5):(0.6-2.5):(0.003-0.01); preferably, the wet ball milling in step (I) is performed for a period of 15-25 h; preferably, the wet ball milling in step (I) is performed at a rotational speed of 30-70 r/min; preferably, the second raw material in step (I) comprises Y2O3, CaCO3, Fe2O3, Gd2O3, GeO2, InO2, TiO2, and V2O5; preferably, the grinding balls comprise zirconium balls and/or steel balls; preferably, the grinding aid comprises any one or a combination of at least two of deionized water, ethanol, acetone, n-propanol, or aqueous ammonia; preferably, the dispersant comprises ammonium citrate and/or aqueous ammonia; preferably, the mixture in step (I) has a particle size range: D50: 0.005-2 m, D90: 0.05-4 m, and D99: 0.05-4 m; preferably, the drying in step (II) is performed at a temperature of 110-130 C.; preferably, the drying in step (II) is stopped when a moisture content is reduced to 0.05-5%.

20. The preparation method according claim 13, wherein the pre-sintering in step (II) is: heating to 560-1100 C. at a heating rate of 1-2 C./min and holding for 2-12 h; preferably, for the pre-sintering in step (II), an oxygen introduction is started when the temperature reaches the pre-sintering temperature; preferably, for the pre-sintering in step (II), the oxygen introduction is stopped when the temperature is 100-200 C. lower than the pre-sintering temperature.

Description

DETAILED DESCRIPTION

[0113] The technical solutions of the present application are further described below in terms of specific embodiments. It should be clear to those skilled in the art that the examples are merely used for a better understanding of the present application and should not be construed as a specific limitation to the present application.

Example 1

[0114] This example provides a microwave ferrite material for a 5G radio frequency device, raw materials for preparing the microwave ferrite material comprise a first microwave ferrite material and a second microwave ferrite material; the first microwave ferrite material is: Y.sub.(3ab)Bi.sub.aCa.sub.bFe.sub.(5cdef)Nb.sub.cZr.sub.dIn.sub.eMn.sub.fO.sub.12, wherein a=0.3, b=0.45, c=0.1, d=0.3, e=0.3, and f=0.05; the second microwave ferrite material is: Y.sub.(3gh)Gd.sub.gCa.sub.hFe.sub.(5ijkn)V.sub.iGe.sub.jIn.sub.kTi.sub.nO.sub.12, wherein g=0.4, h=0.75, i=0.2, j=0.3, k=0.3, and n=0.05.

[0115] A preparation method for the microwave ferrite material comprises the following steps: [0116] (1) the first microwave ferrite material and the second microwave ferrite material were mixed in a mass ratio of 1:1, and subjected to wet ball milling at 50 r/min for 20 h to obtain a mixture; a mass ratio of powder material to zirconium balls to deionized water in the wet ball milling was 1:1:0.8; the mixture obtained had a particle size: D50: 1 m, D90: 2 m, and D99: 3.2 m; [0117] (2) the mixture obtained in step (1) was dried at 120 C. until the moisture content was reduced to 1%, sieved, and then granulated; the granulation was a process that the sieved mixture was mixed with a 12 wt % aqueous solution of polypropylene alcohol, wherein the mass of the aqueous solution of polypropylene alcohol was 10 wt % of the mass of the dried mixture, and then sieved under a pressure of 700 kg/cm.sup.2 with a 60-mesh screen, so as to obtain a ferrite powder; and [0118] (3) the ferrite powder in step (2) was sequentially molded and sintered to obtain the microwave ferrite material for a 5G radio frequency device; the molding had a density of 3.5 g/cm.sup.3; the sintering was heating to 1400 C. at a heating rate of 3 C./min and holding for 12 h; for the sintering, an oxygen introduction was started 3 h before the temperature holding ended; for the sintering, the oxygen introduction was stopped when the temperature was 300 C. lower than the sintering temperature; [0119] the first microwave ferrite material in step (1) is prepared by the following method: [0120] (a) a first raw material (Y.sub.2O.sub.3, CaCO.sub.3, Fe.sub.2O.sub.3, ZrO.sub.2, MnCO.sub.3, InO.sub.2, Bi.sub.2O.sub.3, and Nb.sub.2O.sub.5) were mixed in formula proportions, and subjected to wet ball milling at 50 r/min for 20 h to obtain a mixture; a mass ratio of the first raw material to zirconium balls to deionized water to ammonium citrate in the wet ball milling was 1:1:0.8:0.005; the mixture had a particle size: D50: 1 m, D90: 2 m, and D99: 3.2 m; and [0121] (b) the mixture obtained in step (a) was dried at 120 C. until the moisture content was reduced to 1%, sieved, and then pre-sintered by being heated to 800 C. at 1.5 C./min and held for 8 h, so as to obtain the first microwave ferrite material; for the pre-sintering, an oxygen introduction was started when the temperature reached the pre-sintering temperature; for the pre-sintering, the oxygen introduction was stopped when the temperature was 150 C. lower than the pre-sintering temperature; [0122] the second microwave ferrite material in step (1) is prepared by the following method: [0123] (I) a second raw material (Y.sub.2O.sub.3, CaCO.sub.3, Fe.sub.2O.sub.3, Gd.sub.2O.sub.3, GeO.sub.2, InO.sub.2, TiO.sub.2, and V.sub.2O.sub.5) were mixed in formula proportions, and subjected to wet ball milling at 50 r/min for 20 h to obtain a mixture; a mass ratio of the second raw material to zirconium balls to deionized water to ammonium citrate in the wet ball milling was 1:1:0.8:0.005; the mixture had a particle size: D50: 1 m, D90: 2 m, and D99: 3.2 m; and [0124] (II) the mixture obtained in step (I) was dried at 120 C. until the moisture content was reduced to 1%, sieved, and then pre-sintered by being heated to 800 C. at 1.5 C./min and held for 8 h, so as to obtain the first microwave ferrite material; for the pre-sintering, an oxygen introduction was started when the temperature reached the pre-sintering temperature; for the pre-sintering, the oxygen introduction was stopped when the temperature was 150 C. lower than the pre-sintering temperature.

Example 2

[0125] This example provides a microwave ferrite material for a 5G radio frequency device, raw materials for preparing the microwave ferrite material comprise a first microwave ferrite material and a second microwave ferrite material; the first microwave ferrite material is: Y.sub.(3ab)Bi.sub.aCa.sub.bFe.sub.(5cdef)Nb.sub.cZr.sub.dIn.sub.eMn.sub.fO.sub.12, wherein a=0.2, b=0.3, c=0.15, d=0.2, e=0.2, and f=0.2; the second microwave ferrite material is: Y.sub.(3gh)Gd.sub.gCa.sub.hFe.sub.(5ijkn)V.sub.iGe.sub.jIn.sub.kTi.sub.nO.sub.12, wherein g=0.3, h=0.6, i=0.15, j=0.2, k=0.2, and n=0.1.

[0126] A preparation method for the microwave ferrite material comprises the following steps: [0127] (1) the first microwave ferrite material and the second microwave ferrite material were mixed in a mass ratio of 1:1, and subjected to wet ball milling at 40 r/min for 22 h to obtain a mixture; a mass ratio of powder material to zirconium balls to deionized water in the wet ball milling was 1:1.5:1.5; the mixture obtained had a particle size: D50: 0.8 m, D90: 1.5 m, and D99: 2.5 m; [0128] (2) the mixture obtained in step (1) was dried at 115 C. until the moisture content was reduced to 2%, sieved, and then granulated; the granulation was a process that the sieved mixture was mixed with a 10 wt % aqueous solution of polypropylene alcohol, wherein the mass of the aqueous solution of polypropylene alcohol was 8 wt % of the mass of the dried mixture, and then sieved under a pressure of 900 kg/cm.sup.2 with a 80-mesh screen, so as to obtain a ferrite powder; and [0129] (3) the ferrite powder in step (2) was sequentially molded and sintered to obtain the microwave ferrite material for a 5G radio frequency device; the molding had a density of 3.8 g/cm.sup.3; the sintering was heating to 1350 C. at a heating rate of 2.5 C./min and holding for 15 h; for the sintering, an oxygen introduction was started 2 h before the temperature holding ended; for the sintering, the oxygen introduction was stopped when the temperature was 200 C. lower than the sintering temperature; [0130] the first microwave ferrite material in step (1) is prepared by the following method: [0131] (a) a first raw material (Y.sub.2O.sub.3, CaCO.sub.3, Fe.sub.2O.sub.3, ZrO.sub.2, MnCO.sub.3, InO.sub.2, Bi.sub.2O.sub.3, and Nb.sub.2O.sub.5) were mixed in formula proportions, and subjected to wet ball milling at 40 r/min for 22 h to obtain a mixture; a mass ratio of the first raw material to zirconium balls to deionized water to ammonium citrate in the wet ball milling was 1:1.5:1.5:0.004; the mixture had a particle size: D50: 8 m, D90: 1.5 m, and D99: 2.5 m; and [0132] (b) the mixture obtained in step (a) was dried at 115 C. until the moisture content was reduced to 2%, sieved, and then pre-sintered by being heated to 650 C. at 1.2 C./min and held for 10 h, so as to obtain the first microwave ferrite material; for the pre-sintering, an oxygen introduction was started when the temperature reached the pre-sintering temperature; for the pre-sintering, the oxygen introduction was stopped when the temperature was 120 C. lower than the pre-sintering temperature; [0133] the second microwave ferrite material in step (1) is prepared by the following method: [0134] (I) a second raw material (Y.sub.2O.sub.3, CaCO.sub.3, Fe.sub.2O.sub.3, Gd.sub.2O.sub.3, GeO.sub.2, InO.sub.2, TiO.sub.2, and V.sub.2O.sub.5) were mixed in formula proportions, and subjected to wet ball milling at 40 r/min for 22 h to obtain a mixture; a mass ratio of the second raw material to zirconium balls to deionized water to ammonium citrate in the wet ball milling was 1:1.5:1.5:0.004; the mixture had a particle size: D50: 8 m, D90: 1.5 m, and D99: 2.5 m; and [0135] (II) the mixture obtained in step (I) was dried at 115 C. until the moisture content was reduced to 2%, sieved, and then pre-sintered by being heated to 650 C. at 1.2 C./min and held for 10 h, so as to obtain the first microwave ferrite material; for the pre-sintering, an oxygen introduction was started when the temperature reached the pre-sintering temperature; for the pre-sintering, the oxygen introduction was stopped when the temperature was 120 C. lower than the pre-sintering temperature.

Example 3

[0136] This example provides a microwave ferrite material for a 5G radio frequency device, raw materials for preparing the microwave ferrite material comprise a first microwave ferrite material and a second microwave ferrite material; the first microwave ferrite material is: Y.sub.(3ab)Bi.sub.aCa.sub.bFe.sub.(5cdef)Nb.sub.cZr.sub.dIn.sub.eMn.sub.fO.sub.12, wherein a=0.4, b=0.2, c=0.2, d=0.1, e=0.4, and f=0.3; the second microwave ferrite material is: Y.sub.(3gh)Gd.sub.gCa.sub.hFe.sub.(5ijkn)V.sub.iGe.sub.jIn.sub.kTi.sub.nO.sub.12, wherein g=0.5, h=1.1, i=0.25, j=0.4, k=0.2, and n=0.2.

[0137] A preparation method for the microwave ferrite material comprises the following steps: [0138] (1) the first microwave ferrite material and the second microwave ferrite material were mixed in a mass ratio of 1:1, and subjected to wet ball milling at 60 r/min for 18 h to obtain a mixture; a mass ratio of powder material to zirconium balls to deionized water in the wet ball milling was 1:2:2; the mixture obtained had a particle size: D50: 1.5 m, D90: 2.5 m, and D99: 3 m; [0139] (2) the mixture obtained in step (1) was dried at 125 C. until the moisture content was reduced to 0.5%, sieved, and then granulated; the granulation was a process that the sieved mixture was mixed with a 15 wt % aqueous solution of polypropylene alcohol, wherein the mass of the aqueous solution of polypropylene alcohol was 12 wt % of the mass of the dried mixture, and then sieved under a pressure of 500 kg/cm.sup.2 with a 50-mesh screen, so as to obtain a ferrite powder; and [0140] (3) the ferrite powder in step (2) was sequentially molded and sintered to obtain the microwave ferrite material for a 5G radio frequency device; the molding had a density of 3.2 g/cm.sup.3; the sintering was heating to 1450 C. at a heating rate of 4 C./min and holding for 9 h; for the sintering, an oxygen introduction was started 4 h before the temperature holding ended; for the sintering, the oxygen introduction was stopped when the temperature was 400 C. lower than the sintering temperature; [0141] the first microwave ferrite material in step (1) is prepared by the following method: [0142] (a) a first raw material (Y.sub.2O.sub.3, CaCO.sub.3, Fe.sub.2O.sub.3, ZrO.sub.2, MnCO.sub.3, InO.sub.2, Bi.sub.2O.sub.3, and Nb.sub.2O.sub.5) were mixed in formula proportions, and subjected to wet ball milling at 60 r/min for 18 h to obtain a mixture; a mass ratio of the first raw material to zirconium balls to deionized water to ammonium citrate in the wet ball milling was 1:2:2:0.007; the mixture had a particle size: D50: 1.5 m, D90: 2.5 m, and D99: 3 m; and [0143] (b) the mixture obtained in step (a) was dried at 125 C. until the moisture content was reduced to 0.5%, sieved, and then pre-sintered by being heated to 950 C. at 1.8 C./min and held for 5 h, so as to obtain the first microwave ferrite material; for the pre-sintering, an oxygen introduction was started when the temperature reached the pre-sintering temperature; for the pre-sintering, the oxygen introduction was stopped when the temperature was 180 C. lower than the pre-sintering temperature; [0144] the second microwave ferrite material in step (1) is prepared by the following method: [0145] (I) a second raw material (Y.sub.2O.sub.3, CaCO.sub.3, Fe.sub.2O.sub.3, Gd.sub.2O.sub.3, GeO.sub.2, InO.sub.2, TiO.sub.2, and V.sub.2O.sub.5) were mixed in formula proportions, and subjected to wet ball milling at 60 r/min for 18 h to obtain a mixture; a mass ratio of the second raw material to zirconium balls to deionized water to ammonium citrate in the wet ball milling was 1:2:2:0.007; the mixture had a particle size: D50: 1.5 m, D90: 2.5 m, and D99: 3 m; and [0146] (II) the mixture obtained in step (I) was dried at 125 C. until the moisture content was reduced to 0.5%, sieved, and then pre-sintered by being heated to 950 C. at 1.8 C./min and held for 5 h, so as to obtain the first microwave ferrite material; for the pre-sintering, an oxygen introduction was started when the temperature reached the pre-sintering temperature; for the pre-sintering, the oxygen introduction was stopped when the temperature was 180 C. lower than the pre-sintering temperature.

Example 4

[0147] This example provides a microwave ferrite material for a 5G radio frequency device, raw materials for preparing the microwave ferrite material comprise a first microwave ferrite material and a second microwave ferrite material; the first microwave ferrite material is: Y.sub.(3ab)Bi.sub.aCa.sub.bFe.sub.(5cdef)Nb.sub.cZr.sub.dIn.sub.eMn.sub.fO.sub.12, wherein a=0.1, b=0.8, c=0.25, d=0.4, e=0.1, and f=0.1; the second microwave ferrite material is: Y.sub.(3gh)Gd.sub.gCa.sub.hFe.sub.(5ijkn)V.sub.iGe.sub.jIn.sub.kTi.sub.nO.sub.12, wherein g=0.2, h=0.7, i=0.1, j=0.1, k=0.1, and n=0.4.

[0148] A preparation method for the microwave ferrite material comprises the following steps: [0149] (1) the first microwave ferrite material and the second microwave ferrite material were mixed in a mass ratio of 1:1, and subjected to wet ball milling at 30 r/min for 25 h to obtain a mixture; a mass ratio of powder material to zirconium balls to deionized water in the wet ball milling was 1:3:0.6; the mixture obtained had a particle size: D50: 0.02 m, D90: 0.05 m, and D99: 0.1 m; [0150] (2) the mixture obtained in step (1) was dried at 110 C. until the moisture content was reduced to 5%, sieved, and then granulated; the granulation was a process that the sieved mixture was mixed with a 5 wt % aqueous solution of polypropylene alcohol, wherein the mass of the aqueous solution of polypropylene alcohol was 5 wt % of the mass of the dried mixture, and then sieved under a pressure of 1200 kg/cm.sup.2 with a 100-mesh screen, so as to obtain a ferrite powder; and [0151] (3) the ferrite powder in step (2) was sequentially molded and sintered to obtain the microwave ferrite material for a 5G radio frequency device; the molding had a density of 4 g/cm.sup.3; the sintering was heating to 1300 C. at a heating rate of 2 C./min and holding for 20 h; for the sintering, an oxygen introduction was started 1 h before the temperature holding ended; for the sintering, the oxygen introduction was stopped when the temperature was 100 C. lower than the sintering temperature; [0152] the first microwave ferrite material in step (1) is prepared by the following method: [0153] (a) a first raw material (Y.sub.2O.sub.3, CaCO.sub.3, Fe.sub.2O.sub.3, ZrO.sub.2, MnCO.sub.3, InO.sub.2, Bi.sub.2O.sub.3, and Nb.sub.2O.sub.5) were mixed in formula proportions, and subjected to wet ball milling at 30 r/min for 25 h to obtain a mixture; a mass ratio of the first raw material to zirconium balls to deionized water to ammonium citrate in the wet ball milling was 1:3:0.6:0.003; the mixture had a particle size: D50: 0.02 m, D90: 0.05 m, and D99: 0.1 m; and [0154] (b) the mixture obtained in step (a) was dried at 110 C. until the moisture content was reduced to 5%, sieved, and then pre-sintered by being heated to 560 C. at 1 C./min and held for 12 h, so as to obtain the first microwave ferrite material; for the pre-sintering, an oxygen introduction was started when the temperature reached the pre-sintering temperature; for the pre-sintering, the oxygen introduction was stopped when the temperature was 100 C. lower than the pre-sintering temperature; [0155] the second microwave ferrite material in step (1) is prepared by the following method: [0156] (I) a second raw material (Y.sub.2O.sub.3, CaCO.sub.3, Fe.sub.2O.sub.3, Gd.sub.2O.sub.3, GeO.sub.2, InO.sub.2, TiO.sub.2, and V.sub.2O.sub.5) were mixed in formula proportions, and subjected to wet ball milling at 30 r/min for 25 h to obtain a mixture; a mass ratio of the second raw material to zirconium balls to deionized water to ammonium citrate in the wet ball milling was 1:3:0.6:0.003; the mixture had a particle size: D50: 0.02 m, D90: 0.05 m, and D99: 0.1 m; and [0157] (II) the mixture obtained in step (I) was dried at 110 C. until the moisture content was reduced to 5%, sieved, and then pre-sintered by being heated to 560 C. at 1 C./min and held for 12 h, so as to obtain the first microwave ferrite material; for the pre-sintering, an oxygen introduction was started when the temperature reached the pre-sintering temperature; for the pre-sintering, the oxygen introduction was stopped when the temperature was 100 C. lower than the pre-sintering temperature.

Example 5

[0158] This example provides a microwave ferrite material for a 5G radio frequency device, raw materials for preparing the microwave ferrite material comprise a first microwave ferrite material and a second microwave ferrite material; the first microwave ferrite material is: Y.sub.(3ab)Bi.sub.aCa.sub.bFe.sub.(5cdef)Nb.sub.cZr.sub.dIn.sub.eMn.sub.fO.sub.12, wherein a=0.5, b=0.6, c=0.3, d=0.6, e=0.6, and f=0.6; the second microwave ferrite material is: Y.sub.(3gh)Gd.sub.gCa.sub.hFe.sub.(5ijkn)V.sub.iGe.sub.jIn.sub.kTi.sub.nO.sub.12, wherein g=0.1, h=1.8, i=0.3, j=0.6, k=0.6, and n=0.6.

[0159] A preparation method for the microwave ferrite material comprises the following steps: [0160] (1) the first microwave ferrite material and the second microwave ferrite material were mixed in a mass ratio of 1:1, and subjected to wet ball milling at 70 r/min for 15 h to obtain a mixture; a mass ratio of powder material to zirconium balls to deionized water in the wet ball milling was 1:5:2.5; the mixture obtained had a particle size: D50: 2 m, D90: 3.5 m, and D99: 4 m; [0161] (2) the mixture obtained in step (1) was dried at 130 C. until the moisture content was reduced to 0.05%, sieved, and then granulated; the granulation was a process that the sieved mixture was mixed with a 20 wt % aqueous solution of polypropylene alcohol, wherein the mass of the aqueous solution of polypropylene alcohol was 15 wt % of the mass of the dried mixture, and then sieved under a pressure of 300 kg/cm.sup.2 with a 30-mesh screen, so as to obtain a ferrite powder; and [0162] (3) the ferrite powder in step (2) was sequentially molded and sintered to obtain the microwave ferrite material for a 5G radio frequency device; the molding had a density of 3.5 g/cm.sup.3; the sintering was heating to 1500 C. at a heating rate of 5 C./min and holding for 6 h; for the sintering, an oxygen introduction was started 6 h before the temperature holding ended; for the sintering, the oxygen introduction was stopped when the temperature was 500 C. lower than the sintering temperature; [0163] the first microwave ferrite material in step (1) is prepared by the following method: [0164] (a) a first raw material (Y.sub.2O.sub.3, CaCO.sub.3, Fe.sub.2O.sub.3, ZrO.sub.2, MnCO.sub.3, InO.sub.2, Bi.sub.2O.sub.3, and Nb.sub.2O.sub.5) were mixed in formula proportions, and subjected to wet ball milling at 70 r/min for 15 h to obtain a mixture; a mass ratio of the first raw material to zirconium balls to deionized water to ammonium citrate in the wet ball milling was 1:5:2.5:0.01; the mixture had a particle size: D50: 2 m, D90: 3.5 m, and D99: 4 m; and [0165] (b) the mixture obtained in step (a) was dried at 130 C. until the moisture content was reduced to 0.05%, sieved, and then pre-sintered by being heated to 1100 C. at 2 C./min and held for 2 h, so as to obtain the first microwave ferrite material; for the pre-sintering, an oxygen introduction was started when the temperature reached the pre-sintering temperature; for the pre-sintering, the oxygen introduction was stopped when the temperature was 200 C. lower than the pre-sintering temperature; [0166] the second microwave ferrite material in step (1) is prepared by the following method: [0167] (I) a second raw material (Y.sub.2O.sub.3, CaCO.sub.3, Fe.sub.2O.sub.3, Gd.sub.2O.sub.3, GeO.sub.2, InO.sub.2, TiO.sub.2, and V.sub.2O.sub.5) were mixed in formula proportions, and subjected to wet ball milling at 70 r/min for 15 h to obtain a mixture; a mass ratio of the second raw material to zirconium balls to deionized water to ammonium citrate in the wet ball milling was 1:5:2.5:0.01; the mixture had a particle size: D50: 2 m, D90: 3.5 m, and D99: 4 m; and [0168] (II) the mixture obtained in step (I) was dried at 130 C. until the moisture content was reduced to 0.05%, sieved, and then pre-sintered by being heated to 1100 C. at 2 C./min and held for 2 h, so as to obtain the first microwave ferrite material; for the pre-sintering, an oxygen introduction was started when the temperature reached the pre-sintering temperature; for the pre-sintering, the oxygen introduction was stopped when the temperature was 200 C. lower than the pre-sintering temperature.

Example 6

[0169] This example provides a microwave ferrite material for a 5G radio frequency device, and a preparation method for the microwave ferrite material is the same as that in Example 1 except that the mass ratio of the first microwave ferrite material to the second microwave ferrite material in step (1) is changed to 0.5:1.

Example 7

[0170] This example provides a microwave ferrite material for a 5G radio frequency device, and a preparation method for the microwave ferrite material is the same as that in Example 1 except that the mass ratio of the first microwave ferrite material to the second microwave ferrite material in step (1) is changed to 2:1.

Example 8

[0171] This example provides a microwave ferrite material for a 5G radio frequency device, and a preparation method for the microwave ferrite material is the same as that in Example 1 except that the mass ratio of the first microwave ferrite material to the second microwave ferrite material in step (1) is changed to 0.1:1.

Example 9

[0172] This example provides a microwave ferrite material for 5G radio frequency devices, and a preparation method for the microwave ferrite material is the same as that in Example 1 except that the mass ratio of the first microwave ferrite material to the second microwave ferrite material in step (1) is changed to 2.5:1.

Example 10

[0173] This example provides a microwave ferrite material for a 5G radio frequency device, and a preparation method for the microwave ferrite material is the same as that in Example 1 except that the sintering temperature in step (3) is changed to 1200 C.

Example 11

[0174] This example provides a microwave ferrite material for a 5G radio frequency device, and a preparation method for the microwave ferrite material is the same as that in Example 1 except that the sintering temperature in step (3) is changed to 1600 C.

Comparative Example 1

[0175] This comparative example provides a microwave ferrite material for a 5G radio frequency device; except that the first microwave ferrite material is changed to Y.sub.(3ab)La.sub.aCa.sub.bFe.sub.(5cdef)Nb.sub.cZr.sub.dIn.sub.eMn.sub.fO.sub.12, wherein a=0.3, b=0.45, c=0.1, d=0.3, e=0.3, and f=0.05, and in the raw materials for preparing the first microwave ferrite material, Bi.sub.2O.sub.3 is adaptively replaced with La.sub.2O.sub.3, others are the same as in Example 1.

Comparative Example 2

[0176] This comparative example provides a microwave ferrite material for a 5G radio frequency device; except that the first microwave ferrite material is changed to Y.sub.(3ab)Bi.sub.aCa.sub.bFe.sub.(5cdef)Al.sub.cZr.sub.dIn.sub.eMn.sub.fO.sub.12, wherein a=0.3, b=0.25, c=0.1, d=0.3, e=0.3, and f=0.05, and in the raw materials for preparing the first microwave ferrite material, Nb.sub.2O.sub.5 is adaptively replaced with Al.sub.2O.sub.3, others are the same as in Example 1.

Comparative Example 3

[0177] This comparative example provides a microwave ferrite material for a 5G radio frequency device; except that the second microwave ferrite material is changed to Y.sub.(3gh)Dy.sub.gCa.sub.hFe.sub.(5ijkn)V.sub.iGe.sub.jIn.sub.kTi.sub.nO.sub.12, wherein g=0.4, h=0.75, i=0.2, j=0.3, k=0.3, and n=0.05, and in the raw materials for preparing the second microwave ferrite material, Gd.sub.2O.sub.3 is adaptively replaced with Dy.sub.2O.sub.3, others are the same as in Example 1.

Comparative Example 4

[0178] This comparative example provides a microwave ferrite material for a 5G radio frequency device; except that the second microwave ferrite material is changed to Y.sub.(3gh)Gd.sub.gCa.sub.hFe.sub.(5ijkn)Ga.sub.iGe.sub.jIn.sub.kTi.sub.nO.sub.12, wherein g=0.4, h=0.35, i=0.2, j=0.3, k=0.3, and n=0.05, and in the raw materials for preparing the second microwave ferrite material, V.sub.2O.sub.5 is adaptively replaced with Ga.sub.2O.sub.3, others are the same as in Example 1.

Comparative Example 5

[0179] This comparative example provides a microwave ferrite material for 5G radio frequency devices, and the raw material for the microwave ferrite material is only the first microwave ferrite material in Example 1.

[0180] A preparation method for the microwave ferrite material comprises the following steps: [0181] (1) the first microwave ferrite material obtained in Example 1 was subjected to wet ball milling at 50 r/min for 20 h to obtain a ball-milled material; a mass ratio of the powder material to zirconium balls to deionized water in the wet ball milling was 1:1:0.8; the ball-milled material obtained had a particle size: D50: 1 m, D90: 2 m, and D99: 3.2 m; [0182] (2) the ball-milled material obtained in step (1) was dried at 120 C. until the moisture content was reduced to 1%, sieved, and then granulated; the granulation was a process that the sieved ball-milled material was mixed with a 12 wt % aqueous solution of polypropylene alcohol, wherein the mass of the aqueous solution of polypropylene alcohol was 10 wt % of the mass of the dried ball-milled material, and then sieved under a pressure of 700 kg/cm.sup.2 with a 60-mesh screen, so as to obtain a ferrite powder; and [0183] (3) the ferrite powder in step (2) was sequentially molded and sintered to obtain the microwave ferrite material for a 5G radio frequency device; the molding had a density of 3.5 g/cm.sup.3; the sintering was heating to 1400 C. at a heating rate of 3 C./min and holding for 12 h; for the sintering, an oxygen introduction was started 3 h before the temperature holding ended; for the sintering, the oxygen introduction was stopped when the temperature was 300 C. lower than the sintering temperature.

Comparative Example 6

[0184] This comparative example provides a microwave ferrite material for a 5G radio frequency device, and the raw material for the microwave ferrite material is only the second microwave ferrite material in Example 1.

[0185] A preparation method for the microwave ferrite material comprises the following steps: [0186] (1) the second microwave ferrite material obtained in Example 1 was subjected to wet ball milling at 50 r/min for 20 h to obtain a ball-milled material; a mass ratio of the powder material to zirconium balls to deionized water in the wet ball milling was 1:1:0.8; the ball-milled material obtained had a particle size: D50: 1 m, D90: 2 m, and D99: 3.2 m; [0187] (2) the ball-milled material obtained in step (1) was dried at 120 C. until the moisture content was reduced to 1%, sieved, and then granulated; the granulation was a process that the sieved ball-milled material was mixed with a 12 wt % aqueous solution of polypropylene alcohol, wherein the mass of the aqueous solution of polypropylene alcohol was 10 wt % of the mass of the dried ball-milled material, and then sieved under a pressure of 700 kg/cm.sup.2 with a 60-mesh screen, so as to obtain a ferrite powder; and [0188] (3) the ferrite powder in step (2) was sequentially molded and sintered to obtain the microwave ferrite material for a 5G radio frequency device; the molding had a density of 3.5 g/cm.sup.3; the sintering was heating to 1400 C. at a heating rate of 3 C./min and holding for 12 h; for the sintering, an oxygen introduction was started 3 h before the temperature holding ended; for the sintering, the oxygen introduction was stopped when the temperature was 300 C. lower than the sintering temperature.

Performance Test

[0189] The microwave ferrite materials for a 5G radio frequency device provided in Examples 1-11 and Comparative Examples 1-6 were subjected to grinding process and tested for the saturation magnetization 4Ms, dielectric constant, dielectric loss, density, ferromagnetic resonance linewidth, and Curie temperature. The samples were processed into 2.5 mm spheres to test the saturation magnetization 4Ms and Curie temperature; the density of the samples was determined by water displacement method; the dielectric constant was tested according to IEC60556 standard at a frequency of 10.7 GHz, and the samples were cylinder with a size of 1.6 mm; the ferromagnetic resonance linewidth was tested according to the standard of GB/T 9633-88; the results obtained are shown in Table 1.

TABLE-US-00001 TABLE 1 Saturation Dielectric Curie Resonance magnetization Dielectric loss tg.sub.e Density temperature linewidth 4Ms (Gs) constant (10.sup.4) ( C.) H (Oe) Example 1 1860 14.8 1.2 5.4 275 12 Example 2 1855 14.5 1.52 5.1 270 10 Example 3 1856 14.6 1.8 5.2 272 12 Example 4 1852 14 1.58 5 265 15 Example 5 1854 15 1.6 5.3 260 16 Example 6 1850 14 1.6 5.1 262 15 Example 7 1848 13.8 1.8 5.2 265 18 Example 8 1835 13.8 2 4.6 255 21 Example 9 1830 14 2.2 4.5 250 23 Example 10 1855 13.8 2 5.1 268 21 Example 11 1853 14 2.1 5.2 270 23 Comparative 1650 14 5 4.8 180 40 Example 1 Comparative 1720 13.2 4.5 4.7 205 35 Example 2 Comparative 1635 13.5 5 4.6 195 36 Example 3 Comparative 1728 13.5 4.2 4.7 225 32 Example 4 Comparative 1745 14 4 5 230 28 Example 5 Comparative 1740 14 4 4.8 228 30 Example 6

[0190] In summary, the present application adopts a two-component microwave ferrite material formulation, the addition of Bi.sup.3+ can improve the dielectric constant of the material while lowering the Curie temperature; the addition of Nb.sup.5+ to replace Fe.sup.3+ promotes the substitution of Y.sup.3+ with Bi.sup.3+ and inhibits the generation of other phases; the substitution of Fe.sup.3+ with V.sup.5+ and the substitution of Y.sup.3+ with Gd.sup.3+ can improve the saturation magnetization 4Ms without lowering the Curie temperature; with respect to the preparation method for the microwave ferrite material provided in the present application, by controlling the parameters of ball milling process, the bonding strength of the ferrite powder is improved, the porosity of the ferrite material is reduced, and the resonance linewidth of the microwave ferrite material ultimately obtained is reduced; the proper sintering temperature adjusted can prevent the grains from excessive growth which may be caused by an overly high sintering temperature and overly long period, and is conducive to the formation of microwave ferrite material with good grain size distribution; the microwave ferrite material provided in the present application can satisfy the miniaturization and lightweight requirements of 5G radio frequency devices, the saturation magnetization 4Ms reaches up to 1860 Gs, the dielectric constant is 13.8 or more, the dielectric loss tg.sub.e is less than or equal to 2.210.sup.4, the Curie temperature reaches up to 275 C., and the resonance linewidth H is no more than 23 Oe.

[0191] The above content is only specific embodiments of the present application, and the protection scope of the present application is not limited thereto. It should be clear to those skilled in the art that any changes or substitutions which are obvious to those skilled in the art within the technical scope disclosed by the present application shall all fall within the protection scope and disclosure scope of the present application.