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Cs0.32WO3 Applied for Thermal Insulation Coating

Cs0.32WO3 for thermal insulation coating can be synthesized by hydrothermal method using sodium tungstate and cesium carbonate as raw materials. Wherein, cesium carbonate was added to the tungstic acid solution obtained by ion exchange of sodium tungstate according to Cs/W ratios of 0.1, 0.2, 0.3, 0.4, 0.5, and 0.6, respectively.

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Cs0.32WO3 applied for thermal insulation coating image

According to the experts, the near-infrared shielding performance of the obtained Cs0.32WO3 nano powder changed with the Cs/W ratio of the raw material, which was consistent with the change in crystallinity. With the increase of Cs doping amount, the near-infrared shielding performance of Cs0.32WO3 is stronger. The Cs0.32WO3 sample obtained at a Cs/W ratio of 0.5 has a high concentration of free carriers, the highest crystallinity, and the best near-infrared shielding performance. When the Cs/W ratio is 0.6, the near-infrared shielding performance is slightly lower. This may be due to the low crystallinity and excessive addition of cesium carbonate leading to a decrease in reactivity and the appearance of W defects.

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