Cesium tungstate nanopowder may be applied to produce thermal insulation coating for use in architectural glass and automotive glass. As we all know, there is a big market in the fields of car and building, so a large amount of coating materials are needed to meet large-scale applications. Therefore, experts have studied the preparation method of nano grain size cesium tungstate and found a good preparation method of nanometer cesium tungstate including the following steps:
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1.0 The reaction amount of AMT and cesium sulfate are dissolved in solvent ethanol, and the solution is dried to obtain a powder, and the obtained powder is further pulverized to obtain a mixed powder of tungsten and cesium;
2.0 The tungsten and cesium mixed powder was placed in a closed reaction vessel with stirring, and a polypropylene glycol as a reaction solvent was added thereto and reacted at 240°C for 2.5 hours; wherein the mass of the reaction solvent was 1.8 times the mass of the mixed powder of tungsten and cesium;
3.0 The reaction product in step 2.0 is separated and washed with deionized water/ethanol, dried, and pulverized by a jet mill to obtain nano cesium tungstate. The air pressure is 0.65MPa, and the speed of the air pulverizer classifier is set to 4700r/m.