Cesium Tungsten Bronze, CsxWO3 Applied for Heat Insulation Film

Cesium tungsten bronze, with the formula of CsxWO3, holds interesting optical properties (near-infrared shielding effect) so that it is regarded as a promising material in a wide range of applications, such as, the preparation of heat insulation film. Also, it is reported that Cr-CsxWO3 and Mo-CsxWO3 prepared by a water-controlled release solvothermal method have good near-infrared shielding performance. And some experts have investigated the effects of temperature, time and molar ratio on the properties of cesium tungsten bronze by orthogonal experiments.

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Through experimental research, it is found that the near infrared shielding effect of the material is best when the reaction temperature is 220 °C, the reaction time is 24 h and the molar ratio is 0.015. Films with different thicknesses were prepared. The thermal insulation efficiency of 10μm-CsxWO3, 20μm-Cr-CsxWO3, 10μm-Cr-CsxWO3 films was 71.6%, 68.8% and 58.3%, respectively. The thermal insulation efficiency of the 20μm-Mo-CsxWO3, 10μm-Mo-CsxWO3, 10μm-CsxWO3 film was 81.1%, 73.3% and 71.6%, respectively.

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