Cesium doped tungsten oxide powder may be applied for preparing thermal insulation coating. And the obtained thermal insulation material has the characteristics of high visible light transmittance, low ultraviolet light and near-infrared light transmittance, low cost, no toxicity, and environmental friendliness. According to experts, it is a transparent heat insulation material with great development potential.
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Cesium doped tungsten oxide is also known as Cs doped tungsten oxide or cesium tungsten bronze. In recent years, studies have shown that polybasic metal doped tungsten oxide will have better infrared shielding properties. Some experts used tungstic acid as the tungsten source, CsCl and RbCl as the Cs source and the Rb source, respectively. And a series of solvothermal method was used to prepare a variety of alkali metal single or co-doped tungsten oxide nano powders. The product was characterized by UV-VIS-NIR, XRD, SEM and the like. And it was found that the obtained sample had good crystals, no impurity phase, and a particle diameter of 20-100nm. And the dispersibility was good. When the transmittance of Cs and Rb co-doped samples reaches 70% or more, the blocking ratio at 1300nm is 92.2%%, which is better than that of RbxWO3.
