Blue tungsten oxide powder is a type of transparent thermal insulation material, which may be used to prepare transparent heat insulation film, so that it has excellent ultraviolet and near-infrared shielding characteristics and high visible light transmittance. Therefore, the observation of phase structure of blue tungsten oxide has certain guiding significance for blue tungsten oxide applying to the production of thermal insulation materials.
Phase Structure of Blue Tungsten Oxide
The composition of blue tungsten oxide is subject to the preparation methods and conditions. And the variation range of composition of blue tungsten oxide is characterized by oxygen index, which changes in a wider range of WO2.72~WO2.99, and the material color is changing among iron gray, black blue, prussian blue and sapphire.
The microscopic morphology of blue tungsten oxide generally maintains the crystal morphology of original APT, while the crystal morphology of APT depends on the process method and crystallization process during APT production.
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