Yellow tungsten oxide, or tungsten trioxide, can be used in car thermal insulation glass. According to experts, such glass is an electrochromic glass, which is also known as a smart window. Due to its high heat insulation performance, the energy consumption of the air conditioning can be reduced to some extent. In other words, the heat insulation glass can reduce the effects of external temperature or light on the temperature in car. Besides, it can also reduce the damage caused by ultraviolet rays to the skin with low transmittance of ultraviolet rays.
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In general, tungsten trioxide is used in the form of an electrochromic film on a large area smart window. For the preparation of such film, some experts have studied the preparation of WO3 electrochromic film by hydrothermal method and electrodeposition method, and the emphasis is on simplifying the preparation process, improving the electrochromic performance and meeting the requirements of practical applications. However, the experts also found that the two methods still have some problems in the research process, such as the preparation of large-area products and the stability of the film cycle. That is to say, these problems make the possibility of the two coating processes replacing the vacuum coating process in the near future reduced.
