Experts said that Cs0.33WO3 particles, also known as cesium tungsten bronze nanoparticles, may be used to prepare a transparent thermal insulation paper, that is, heat insulating film. Among them, they studied the effects of different film-forming materials, including PVA, PVB, and PVP, on the visible-near-light transmittance of cesium tungsten bronze particles. The image below is the transmittance spectra of PVA/Cs0.33WO3、PVB/Cs0.33WO3、PVP/Cs0.33WO3 coating.
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It can be seen from the above image that the transmittance of PVA composite cesium tungsten bronze coating and PVP composite cesium tungsten bronze coating almost coincides in the visible-near-infrared region. The highest transmittance of the two coatings using water as solvent in the visible region of 380-780nm reaches 80%. And the lowest transmittance in the near-infrared region of 780-1100nm is 44%. In a word, the new type of coating of nano particle size of cesium tungsten bronze exhibits good visible light transmission and near-infrared shielding properties.
