CsxWO3 Applied for Near Infrared Light Shielding Film

CsxWO3, or cesium tungsten bronze, can be used to produce a new environmentally friendly near infrared light shielding film. According to the experts, with the promotion of CsxWO3 in the application of heat insulation, the preparation of cesium tungsten bronze has received more and more attention. Well, how to prepare cesium tungsten bronze nanoparticles?

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A Production Method of CsxWO3 for Near Infrared Light Shielding Film

At least one of ammonium tungstate, ammonium paratungstate, and ammonium metatungstate is used as a tungsten source; at least one of cesium hydroxide, cesium carbonate, cesium oxalate, and cesium citrate is used as a cesium source; at least one of urea, PVP, PVA, oxalic acid and ammonium oxalate is used as a dispersant; the abovementioned tungsten source, cesium source, and dispersant are separately dissolved in water to obtain three solutions, and the three solutions are sequentially mixed uniformly with at least two kinds of the alcohol, ether, and ester functional groups, and then concentrated and dried at a temperature lower than 120 °C to obtain the powder; then, the powder is calcined at a temperature of 250-800 °C for 1-8h to obtain the blue powder; then the blue powder is stirred in an autoclave at a hydrothermal condition of 120-250 °C for 1-8 h, and then filtered, dried and pulverized to obtain blue cesium tungsten bronze nano powder.

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