Tungsten oxide nanopowder may be used to prepare a smart film, which can be applied to building glass to obtain a new type of transparent heat insulation glass. Such glass can not only play the role of thermal insulation and heat preservation, but also has high visible light transmittance. It means that the tungsten trioxide smart glass not only reduces expenses, but ensures indoor lighting. And it can reduce the radiation damage caused by ultraviolet rays to indoor human skin and objects.
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In the summer, tungsten trioxide smart film shields up to 79% of infrared rays, which reduces cooling costs as it shields most of the solar infrared heat. The loss of heat through the windows in winter not only makes the insiders feel uncomfortable, but also increases unnecessary energy costs. Applying the tungsten trioxide heat insulating film on the inner surface of common single-layer glass can reduce heat loss by 30%.
