A preparation method of cesium tungstate nanopowder for near infrared shielding material is introduced, which mainly comprises the following steps:
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1.0 The reaction amount of APT and cesium sulfate are dissolved in the solvent n-propanol, and the solution is spray-dried to obtain powder particles, and the obtained powder particles are further subjected to ball milling and pulverization to obtain a mixed powder of tungsten and cesium;
2.0 The mixed powder of tungsten and cesium were placed in a closed reaction vessel with stirring. Triethylene glycol as a reaction solvent was added thereto, and the reaction was performed at 330°C for 4.5 hours by stirring. The mass of the reaction solvent was 1 times of the mass of the mixed powder of tungsten and cesium;
3.0 The reaction product in step 2.0 is separated by centrifugal separation method, and washed with deionized water or ethanol, followed by drying, and then pulverizing by a jet mill to obtain nano cesium tungstate. The air pressure of the air bag of the crushing chamber of the jet mill was 0.8MPa, and the speed of the classifier of the jet mill was set to 2800r/m.
