Cs0.32WO3 for preparing ceramic microsphere is cesium doped tungsten oxide nano powder that has been regarded as highly promising NIR shielding material. Until now, cesium doped tungsten oxide nanoparticles have been synthesized via solid state, hydrothermal, water controlled-release solvothermal, and thermal plasma synthesis methods that need high energy, costs, or long time. Thus, it is necessary to synthesize cesium doped tungsten oxide nanoparticles using a rapid and energy effective method to make it feasible for large-scale and practical applications.

Cs0.32WO3 for thermal insulation paper can be prepared by hydrothermal synthesis method using sodium tungstate and cesium carbonate as raw materials. Wherein, D-malic acid is added as a reducing agent. But why choose D-malic acid as the reducing agent?

Cs0.32WO3 is an important functional material for producing transparent thermal insulation material such as thermal insulation film or thermal insulation coating. According to the experts, the absorbance (near-infrared shielding performance) of Cs0.32WO3 is closely related to its crystallinity, microstructure and other factors. The near-infrared shielding performance of Cs0.32WO3 is enhanced with the increase of free carrier concentration and crystallinity, and is greatly enhanced with the formation of nanorod-like morphology.

Cs0.32WO3 for thermal insulation coating can be synthesized by hydrothermal method using sodium tungstate and cesium carbonate as raw materials. Wherein, cesium carbonate was added to the tungstic acid solution obtained by ion exchange of sodium tungstate according to Cs/W ratios of 0.1, 0.2, 0.3, 0.4, 0.5, and 0.6, respectively.