METHOD FOR MECHANOCHEMICAL PREPARATION OF HIGH TEMPERATURE-RESISTANT BISMUTH YELLOW PIGMENT

Abstract

The present disclosure relates to a method for preparation of a high temperature-resistant bismuth yellow pigment. The method comprises: mixing an oxide which served as a matrix and dopan with a bismuth source, a vanadium source, or a molybdenum source, and then placing the mixture into a mill for grinding to obtain a precursor; further calcining and crushing the precursor to obtain the high temperature-resistant bismuth yellow pigment powder. The bismuth yellow pigment has a bright color, a b* value greater than 90, a stable performance, and a high heat-resistance above 800° C. The method is environmentally friendly without waste, and reaction conditions are simple. Doping of BiVO.sub.4 crystal lattices by incorporation of oxides can be achieved, so that the particle size and distribution of the bismuth yellow pigment can be effectively controlled while the color performance of the bismuth yellow pigment is greatly improved.

Claims

1. A method for preparation of high temperature-resistant bismuth yellow pigment, comprising the following steps: mixing the oxides served as a matrix and dopan with bismuth source, and vanadium source or molybdenum source, and then placing the mixture into a mill for grinding to obtain a precursor, further calcining and crushing the precursor to obtain the high temperature-resistant bismuth yellow pigment powder.

2. The method for preparation of the high temperature-resistant bismuth yellow pigment according to claim 1, wherein the oxide served as the matrix and the dopant is composed of silica, aluminum oxide and divalent metal oxides with a mass ratio of 1:0.1:0.1-1:20:10.

3. The method for preparation of the high temperature-resistant bismuth yellow pigment according to claim 2, wherein the divalent metal oxide is one of magnesium oxide, calcium oxide, strontium oxide, and barium oxide at least.

4. The method for preparation of the high temperature-resistant bismuth yellow pigment according to claim 1, wherein the addition amount of the oxides as the matrix and the dopant is 1-4 times of the bismuth source mass.

5. The method for preparation of the high temperature-resistant bismuth yellow pigment according to claim 1, wherein the bismuth source is one of bismuth nitrate, bismuth sulfate, bismuth chloride, bismuth acetate, and bismuth oxide at least.

6. The method for preparation of the high temperature-resistant bismuth yellow pigment according to claim 1, wherein the vanadium source is any one of ammonium metavanadate, sodium metavanadate, sodium vanadate and vanadium pentoxide, and the mass ratio of the bismuth source to the vanadium source is 1: 1-1:5.

7. The method for preparation of the high temperature-resistant bismuth yellow pigment according to claim 1, wherein the molybdenum source is any one of sodium molybdate, ammonium molybdate or potassium molybdate, and the mass ratio of the bismuth source to the molybdenum source is 1: 20-1:0.25.

8. The method for preparation of the high temperature-resistant bismuth yellow pigment according to claim 1, the mass ratio of ball to material is selected to 5-50: a grinding speed is 100-1200 rpm, and grinding time is 30-360 min during grinding.

9. The method for preparation of the high temperature-resistant bismuth yellow pigment according to claim 1, wherein the calcination temperature of the precursor is 300-800° C., and calcination time is 30-240 min.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0026] FIG. 1 is the X-ray diffraction spectra of the bismuth yellow pigments prepared in Examples 1-5.

[0027] FIG. 2 is the thermogravimetric curves of the bismuth yellow pigment prepared in Example 1 and the commercially available bismuth yellow pigment.

[0028] FIG. 3 is the UV-vis diffuse reflectance spectra of the high temperature-resistant bismuth yellow pigments prepared in Examples 1-4.

[0029] FIG. 4 is the Kubelka-munk plots of the high temperature-resistant bismuth yellow pigments prepared in Examples 1-4.

DETAILED DESCRIPTION

[0030] The preparation and performance of the high temperature-resistant bismuth yellow pigment of the present disclosure will be further illustrated by specific embodiments below.

Example 1

[0031] 0.243 g of bismuth nitrate, 0.116 g of ammonium metavanadate, 0.200 g of silica, 0.400 g of alumina and 0.100 g of magnesium oxide were mixed and put into a 50 mL zirconium dioxide ball mill. 20 g of zirconium dioxide balls with a diameter of 2 mm and a ball to material ratio of 20 was added and ground at 600 rpm for 120 min, and then the prepared precursor was calcined at 700° C. for 1 h to obtain a bright yellow bismuth yellow pigment, marked as S-1, and the color parameters of L*, a* and b* were shown in Table 2.

Example 2

[0032] 0.157 g of bismuth chloride, 0.276 g of sodium vanadate, 0.200 g of silica, 0.200 g of alumina and 0.200 g of calcium oxide were mixed and put into a 50 mL zirconium dioxide ball mill. 10 g of zirconium dioxide balls with a diameter of 2 mm and a ball to material ratio of 10 was added and ground at 500 rpm for 180 min; the prepared precursor was calcined at 600° C. for 90 min to obtain a bright yellow bismuth yellow pigment, marked as S-2, and the color parameters of L*, a* and b* were shown in Table 2.

Example 3

[0033] 0.122 g of bismuth nitrate, 0.078 g of bismuth chloride, 0.117 g of ammonium metavanadate, 0.242 g of sodium molybdate, 0.300 g of silica, 0.200 g of alumina and 0.200 g of magnesium oxide were mixed and put into a 50 mL zirconium dioxide ball mill. 39 g of zirconium dioxide balls with a diameter of 2 mm and a ball to material ratio of 30 was added and ground at 700 rpm for 180 min; the prepared precursor was calcined at 500° C. for 240 min to obtain a bright yellow bismuth yellow pigment, marked as S-3, and the color parameters of L, a* and b* were shown in Table 2.

Example 4

[0034] 0.353 g of bismuth sulfate, 0.029 g of ammonium metavanadate, 0.122 g of sodium molybdate, 0.300 g of silica, 0.200 g of alumina and 0.18 g of barium oxide were mixed and put into a 50 mL zirconium dioxide ball mill. 6 g of zirconium dioxide balls with a diameter of 2 mm and a ball to material ratio of 5 was added and ground at 800 rpm for 240 min; the prepared precursor was calcined at 800° C. for 90 min to obtain a bright yellow bismuth yellow pigment, marked as S-4, and the color parameters of L, a* and b* were shown in Table 2.

Example 5

[0035] 0.233 g of bismuth oxide, 0.182 g of vanadium pentoxide, 0.200 g of silica, 0.300 g of aluminum oxide and 0.100 g of magnesium oxide were mixed and put into a 50 mL zirconium dioxide ball mill. 20 g of zirconium dioxide balls with a diameter of 2 mm and a ball to material ratio of 20 was added and ground at 800 rpm for 360 min; the prepared precursor was calcined at 400° C. for 120 min to obtain a bright yellow bismuth yellow pigment, marked as S-5, and the color parameters of L, a* and b* were shown in Table 2.

TABLE-US-00002 TABLE 2 L*, a*, b* values of the bismuth yellow hybrid pigments prepared in Examples 1-5 Samples L* a* b* S-1 82.34 1.00 92.07 S-2 82.97 5.15 90.25 S-3 83.78 −0.48 91.17 S-4 81.61 5.58 92.54 S-5 83.55 −4.6 91.38