
Nano grain size yellow tungsten oxide is a near infrared shielding material that may be used in building glass to play a role of heat insulation, in the form of coating or film. This type of material has high UV shielding performance, and the ultraviolet shielding rate is as high as 99%, thereby providing a safe “sun protection umbrella” for residents and other personnel in such buildings, without pollution. Also, it reduces the energy costs on air conditioning. At the…