Yellow tungsten oxide nanopowder may be applied to energy-efficient glass in the form of a smart film. In the future, there will be more environmentally friendly smart film products coming into our lives. For example, the glass used in the energy-saving glass curtain wall is a smart glass or an electrochromic glass of tungsten oxide nanoparticles for building. It can change color according to temperature changes due to a layer of smart nano-film on the glass.
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The smart film is transparent in the normal state. It gradually turns light blue after the temperature rises. And it changes back to transparency after the temperature is lowered. The test shows that when the smart film is in a light blue state, it can shield more than 98% of ultraviolet rays and 97% of infrared rays, and the shielding effect is better than many heat insulating films. In addition to effective energy conservation, this new nano-dingal film can also promote crop growth. Some experts used the tungsten oxide thermal insulation film to make a greenhouse and carried out a planting test for about 18 months. It was found that crops grew better and yields were higher.
