Ammonium Metatungstate Powder Applied for Infrared Thermal Insulation Nano Material

Ammonium metatungstate powder and cesium carbonate powder can be used as the main raw materials for preparing cesium tungsten bronze. The obtained powder is cesium tungsten bronze nano powder, which can be used to produce a variety of new type of infrared thermal insulation nano material such as transparent thermal insulation film, thermal insulation coating and thermal insulation dispersion for architectural glass.

Some experts have proposed the following preparation method of cesium tungsten bronze to improve the uniformity of distribution of tungsten raw material and cesium raw material.

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Ammonium metatungstate and cesium carbonate are soluble in water. Experts said that they are the main raw materials. The two kinds of powders are first dissolved in water and mixed to obtain the raw materials of tungsten and cesium with uniform atomic distribution, and then drying at 145°C. The product was heat-treated at 550°C for 20 minutes in air at a hydrogen gas volume ratio of 10% to obtain cesium tungsten bronze powder. However, experts have also mentioned that even if the method improves the mixing uniformity of the raw material ions, it is also necessary to see that, due to the relatively low temperature of 550°C, and the heat treatment time of only 20 minutes, it is difficult to thermally decompose the tungsten and cesium raw materials at high temperature and obtain cesium tungsten bronze powder with high crystallinity.

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