Tungsten oxide may be applied for producing an infrared thermal insulation nano material such as tungsten trioxide transparent heat insulation coating. Nowadays, applying transparent thermal insulation coating for on-site glass coating processing is an important means to achieve energy-saving renovation of old building glass doors and windows. However, on-site construction technology has been a major factor limiting the promotion and development of thermal insulation coatings for a long time.
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At present, the construction technology of coatings has made important breakthroughs, basically achieving a set of special equipment and construction acceptance specifications for on-site construction. In 2016, the “Technical Specifications for the Application of Building Glass Films” has been officially released. According to experts, the tungsten oxide thermal insulation coating has an infrared shielding ratio higher than 80%, an ultraviolet blocking ratio higher than 99%, and a visible light transmittance higher than 75%. It is very important that the thermal insulation coating of nano particle size tungsten oxide has high transparency, as some energy-saving materials, such as Low-E glass, whose visible light transmittance is reduced gradually as the energy saving effect increases.
