Nano tungsten trioxide may be applied as the material for thermal insulation coating, and therefore it can be used for architectural glass (such as skylight, glass curtain walls, glass window, etc.) and automobile glass. This kind of thermal insulation coating has the following advantages:
1. Not easy to fade with long-lasting color;
2. With weather resistance, high temperature resistance, high heat insulation, high UV resistance, anti-UV up to 99%, can prevent furniture from fading and protect people from skin tanning;
3. Will not affect wireless communication.
Tungsten trioxide powder was synthesized under hydrothermal conditions using sodium tungstate and hydrochloric acid as the main reaction materials. The effects of different pH values and reaction temperatures on the structure, morphology and photochromic properties of tungsten trioxide powder were analyzed. And the preliminary discussion of the mechanism of photochromism of tungsten trioxide powder can determine the basic preparation process of tungsten trioxide photochromic powder.
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