Tungsten trioxide nanopowder can be used to prepare an electrochromic glass, that is, a smart glass with the characteristics of heat resistance and UV resistance. In the past, due to the high price, most of the smart glass was only used in niche applications, such as the windows of luxurious cars, high-end sunglasses, and the windows of Boeing's new aircraft.
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Now, the wave of energy conservation and emission reduction is driving the concept of smart energy-saving buildings. So, the smart glass of heat insulation and heat preservation performance is also regarded as a part of smart buildings. However, there are two problems. On the one hand, the price of smart glass is still high. On the other hand, the traditional smart glass is mainly to shield visible light, and new smart buildings require improving the infrared rays shielding performance. For example, in the past few years, the research team at the University of Texas at Austin developed a new nano-crystal smart glass - heat insulation is improved, cost is reduced, and the application is promoted.