WO3 smart window is one of the common new building energy saving solutions. As you may have known, the visible light transmittance, heat transfer coefficient, and heat shielding coefficient of passively regulated energy-saving glass such as low-emissivity glass, vacuum glass, and insulating glass are fixed in relation to glass lighting and energy saving. Therefore, these glasses cannot meet the requirements of all consumer groups. And therefore, smart glass using nano particle size tungsten trioxide as an electrochromic material appeared.
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http://www.tungsten-powder.com/tungsten-oxide.html
Back in 1987, a new building energy-saving window based on electrochromic film, that is, the smart window, was brought up. In the 1990s, the Germans first produced the exterior building wall of electrochromic glass, and the electrochromic industry entered a stage of rapid development. At present, some US companies have realized large-scale production of solid-state all-inorganic electrochromic glass. Industry research companies predict the market size. They said that the market value of electrochromic glass will exceed $3 billion by 2022, including applications such as building smart windows, aircraft portholes, and automotive anti-glare rearview mirrors.
