Cesium doped tungsten oxide nanopowder, which has the performance of shielding near-infrared rays, may be applied for producing thermal insulation paper. And therefore the transparent heat-insulating thin paper may be used for heat insulation of automobile and architectural glass without affecting day lighting.
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According to reports, during the summer day, the heat entering the room from the windows accounts for 73% of the total heat. The heat from the window is mainly from the sun, so to block the heat from entering the window, it is necessary to block the heat of the sun. The day lighting and the infrared effect are related to the visible light and the infrared light in the sunlight, while the near infrared light (wavelength 780~2500nm) has most of the heat in the sunlight. If the transmission amount of the near infrared is reduced, the "heat" caused by the thermal effect can be greatly reduced. Therefore, the transparent heat insulating material prepared by using cesium doped tungsten oxide as a raw material has a great demand for heat insulation of automobile and building window glass.
