Cesium Doped Tungsten Oxide Nanopowder Applied for Thermal Insulation Dispersion Liquid

Cesium doped tungsten oxide nanopowder, which is an infrared barrier material, may be applied for preparing thermal insulation dispersion liquid. In recent years, such transparent dispersion liquid has been widely used in the field of architectural glass. At the same time, experts have also done in-depth research on the preparation of this new environmentally friendly heat-insulation material. They proposed the following preparation method of cesium doped tungsten oxide nano powder, which has the characteristics of low process energy consumption, low cost, easy operation and good environmental protection so that it is suitable for large-scale industrial production. The preparation process concludes the following steps:

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1.0 The raw material tungsten salt (ammonium tungstate) and the cesium salt (cesium carbonate) are respectively dissolved in a solvent, and the tungsten salt solution is configured into a tungstic acid solution through an exchange resin;

2.0 The tungstic acid solution, the cesium salt solution and the reaction solvent are mixed and continuously stirred for 1-3h to obtain a hydrothermal reaction precursor liquid;

3.0 The precursor solution is placed at 180-300°C, and the reaction is performed for 5-20h;

4.0 The hydrothermal reaction precipitate is washed, dried, pulverized, and calcined to obtain cesium doped tungsten oxide powder. The obtained cesium doped tungsten oxide nano powder has good stability. The ultraviolet blocking rate is greater than 99.8%, the visible light transmittance is 70-88%, and the infrared blocking rate is 94-99%.

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