Cs0.32WO3 is a welcome infrared thermal insulation nano material with good near-infrared absorption properties. Some experts have synthesized Cs0.32WO3 rod-like nanoparticles by a hydrothermal method using sodium tungstate and cesium carbonate as raw materials and D-malic acid as a reducing agent. Also, they prepared the transparent near-infrared shielding film by coating the mixture of Cs0.32WO3 dispersed solution with SiO2 sol on glass substrate. And they studied the effects of crystallinity and microstructure on NIR absorption properties of Cs0.32WO3 nanoparticles to find that:
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The sample with n(Cs)/n(W)=0.5 promotes the formation of hexagonal Cs0.32WO3 during hydrothermal synthesis. Moreover, with increasing reaction time, the morphology of the sample changes from irregular-shaped nanoparticles to rod-like nanoparticles. The NIR absorption ability of the prepared Cs0.32WO3 nanoparticles increases with increasing crystallinity. Moreover, this absorption ability increases greatly when the rod-like morphology nanoparticles form. The visible light transmittance of the prepared glass with Cs0.32WO3 transparent coating is kept at 71.6%, while the transmittance of NIR light is only 10.2%. It reveals excellent optical transmission and NIR absorption properties, showing application potentials in the fields of automobile window glass and building glass.
