Cs0.32WO3, or cesium tungsten bronze, is usually used to produce sunroom thermal insulating coating. With the population of such a new type of environmentally friendly sunroom thermal insulating coating, cesium tungsten bronze is also attracting more attention. So, the synthesis of Cs0.32WO3 nano powder and thin film is paid much attention. Some experts have prepared the cesium tungsten bronze by a simple solution-based chemical route.
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The experts performed the experiment within a relatively short time to easily produce large amounts of hexagonal Cs0.32WO3 powders. The CsxWO3 powders as synthesized and after heat treatment were characterized by X-ray diffraction, scanning electron microscopy, differential thermal and thermogravimetric analysis and Fourier transform infrared spectroscopy. CsxWO3 thin films were deposited by an electron beam evaporation method from sintered Cs0.32WO3 powders as the targets. The CsxWO3 films were annealed at different temperatures under Ar and Ar/H2 atmospheres. The effects of annealing on the microstructure, morphology and near-infrared (NIR) shielding properties of the Cs0.32WO3 films are discussed. The results show that the Cs0.32WO3 thin film specimen annealed for 500 °C in an Ar/H2 atmosphere has the highest transmittance (80%) in the visible light region and the lowest transmittance (42%) in the NIR region.
