Cesium Tungstate Powder Applied for Thermal Insulating Glass

Cesium tungstate powder may be used in the field of thermal insulating glass. With the promotion of nano grain size cesium tungstate in the field of thermal insulation, the preparation of cesium tungstate nanopowder is more important. In this regard, some experts have proposed to use tungsten chloride and cesium hydroxide as raw materials, dissolved in anhydrous ethanol, and reacted in an autoclave at 200°C for 12 hours. And the obtained precipitated product is further heat treated at 500-900°C in N2 atmosphere for 1h to obtain cesium tungstate powder.

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Experts said that this method makes full use of the high-pressure thermal stability of the intermediate particles obtained by crystallization of the high-pressure reactor. Also, it can inhibit the growth of the cesium tungstate particles in the subsequent high-temperature heat treatment process, and the degree of agglomeration of the powder is also greatly reduced. At the same time, the method also avoids the use of hydrogen and improves production safety. However, it has to be said that the method still requires a high-temperature heat treatment, and the powder thus obtained still has a problem that the particles are excessively large. Moreover, the raw material used is higher in cost. And the equipment cost is also increased. Beside, the process is cumbersome, and the production efficiency is not high, so further research on the preparation method of cesium tungstate is required.

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