Cesium Doped Tungsten Oxide Nanopowder Applied for Infrared Ultraviolet Shielding Material

Cesium doped tungsten oxide nanopowder may be applied for producing infrared ultraviolet shielding material. The obtained material has good thermal insulation effect. The ultraviolet blocking rate is up to 99.9%, the visible light transmittance is up to 88%, and the infrared blocking rate is up to 99%. In this regard, experts say that the cesium doped tungsten oxide nano powder with the above properties can be prepared by the following steps:

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1.0 The reaction amount of the raw material sodium tungstate and cesium carbonate is dissolved in deionized water, respectively. And the sodium tungstate solution is prepared into a tungstic acid solution;

2.0 Dissolving sorbic acid in deionized water to obtain a reaction solvent. The mass of the reaction solvent is 1.5 times the total mass of the tungsten salt and the cesium salt. The tungstic acid solution, the cesium carbonate solution and the reaction solvent are mixed and reacted under water bath at 60°C. Stirring for 2 hours under the above conditions to prepare a hydrothermal reaction precursor liquid;

3.0 The precursor liquid is placed in a closed hydrothermal reaction kettle with a stirring device, and the reaction is performed at 200°C for 12h;

4.0 The hydrothermal reaction precipitate was repeatedly washed with deionized water, dried at 90°C for 1h, and then pulverized by a jet mill. The air pressure in the crushing chamber was controlled at 0.6MPa, and the pulverization speed was set at 4000r/min, finally, the powder was heated to 600°C at a rate of 5°C/min in a vacuum atmosphere, and heat treatment was continued for 1h to obtain a nano cesium tungsten oxide powder.

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