Nano grain size yellow tungsten oxide may be applied for manufacturing nano-ceramic color master, and then be used to prepare heat insulating film, and therefore be applied in heat insulating glass with excellent spectral selectivity and stability. Thus, the glass will have remarkable heat insulating effect to block radiation of light wave. The overall shielding rate of near infrared rays is as high as 90%, and the visible light transmittance is over 70%.
Heat insulation principle of yellow tungsten oxide film: In summer, yellow tungsten oxide film on the glass may absorb most of the near infrared radiation energy in the sunlight and then may radiate to both sides of the window. Due to the high air mobility outside, most of the heat on the surface of the glass substrate is quickly taken away, so that the amount of heat radiated to inside is reduced, thereby providing nice heat insulating effect and reducing energy consumption of air conditioner.
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