Cs0.32WO3 powder for the production of nano heat insulating coating may be nanoscale cesium tungsten oxide of particle size of 50-70 nm. According to the experts, Cs0.32WO3 nano powder is a blue-black powder that has strong absorption in near infrared region (780-1100nm wavelength) and high transmittance ability in the visible region (380-780 nm wavelength).
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As such a new type of environmentally friendly nano heat insulating coating is attracting much attention in building energy efficiency, the near-infrared shielding material cesium tungsten oxide nano powder is also more and more popular. And the preparation of cesium tungsten oxide nanoparticles is also paid much attention. So, how to prepare Cs0.32WO3? It is reported that the CsxWO3 powder may be prepared by two solution-based chemical routes. One of the methods is hot injection method, whose materials are WCl6, Cs2CO3, oleylamine, NH4OH and tri-n-octylamine and the other is low-reaction temperature method, whose materials are H2WO4, CsOH?H2O and deionized water with triethylamine. Two methods can produce hexagonal CsxWO3 powders, which have desirable visible transmittance and good near infrared shielding properties.
