Cesium Doped Tungsten Oxide Applied for Thermal Insulation Coating

Cesium doped tungsten oxide may be applied for preparing thermal insulation coating, which can be applied in architectural glass in a form of heat insulation film. The obtained thin film has excellent near-infrared shielding property. Therefore, Cs doped tungsten oxide powder has received more and more attention from scholars, experts and manufacturers of heat insulation materials. In this regard, some experts have adopted low temperature (200°C) solvothermal synthesis method, using cesium hydroxide and tungsten hexachloride as raw materials to synthesize Cs doped tungsten oxide powder.

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However, since cesium hydroxide and tungsten hexachloride are easily hydrolyzed and volatilized, which is harmful to the human body and the environment, the use of a milder raw material to synthesize Cs doped tungsten oxide powder for large-scale production and practical application is necessary. Therefore, some experts have prepared Cs-doped tungsten oxide powder by low temperature hydrothermal synthesis using cesium carbonate and sodium tungstate as raw materials and citric acid as the reaction solvent. They also studied the effects of hydrothermal reaction time, citric acid content and ethanol on the light absorption properties of the synthesized Cs doped tungsten oxide, and further explored the effect of ultraviolet light on the near-infrared shielding properties of heat insulation film of Cs doped tungsten oxide. And the absorption mechanism and transmission spectra were analyzed.

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