WO3 powder may be used to prepare a heat insulation coating for applying to glass curtain wall. The obtained transparent heat-insulating coating is a new type of environmentally friendly water-based coating, which contains no harmful substances such as free formaldehyde, lead, chromium, cadmium and mercury, and meets the national environmental quality standards.
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The heat insulating nano coating of tungsten trioxide can form a thin transparent film of about 8-10μm on the surface of the substrate, which can effectively shield infrared rays and ultraviolet rays. Specifically, it can shield more than 99% of ultraviolet rays, and can block infrared rays of more than 75%. Besides, the visible light transmittance is as high as 70% or more so that it does not affect the visual field. Data shows that the nano heat insulating coating of nano tungsten trioxide particles can reduce the indoor temperature by 3-5°C. And therefore such coating has been more and more widely applied in building glasses with the development of energy saving reconstruction of building.
