Tungsten trioxide powder, a new infrared thermal insulation nano material, has high heat insulation, high light transmittance (visible light), weather resistance and other characteristics due to the photochromic properties of tungsten trioxide. And therefore, it has wide application in the field of heat insulation film.
Using oxalic acid as an organic inducer, tungsten trioxide with novel morphology may be synthesized to improve the absorption ability of the powder to exciting light (including ultraviolet and near-infrared rays in sunlight), thereby improving the photochromic properties of tungsten trioxide.
Oxalic Acid Induced Synthesis of Hexagonal Tungsten Trioxide
The oxalic acid induced product is hexagonal tungsten trioxide with a particular structure, which is made up of regularly spindle particles with uniform size and shape, 200-300nm in length, 30-50nm in width, and with aspect ratio of 4-10. And the special morphology improves its absorptive capacity to the exciting light source, and therefore resulting in its high photochromic properties.
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