Dark blue nano tungsten oxide, which may be applied for producing thermal insulation dispersion liquid, is a new heat insulation material with potential market. So, the blue tungsten oxide is studied. Researchers have found that: the quality of blue tungsten oxide can be affected by the precursor ammonium paratungstate (APT). That is to say, blue tungsten oxide can inherit the structure, morphology and other properties of APT, so the quality of APT has a fundamental effect on the quality of blue tungsten oxide powder.
Therefore, strict product classification standards of different categories of ammonium paratungstate should be established for the production needs of different categories of products. In addition, some researchers have found that the ammonium paratungstate of regular shape is rich in crystal growth and uniform in crystal grains with almost no agglomeration, which contributes to the production of blue tungsten oxide with the characteristics of coarse particles, uniform particles, large specific surface area, high hydrogen and copper content. Therefore, the obtained nano grain size blue tungsten oxide powder also contributes to the preparation of the heat insulating dispersion liquid.
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