Tungsten Oxide Nanoparticles Applied for Energy Efficient Building Glass

Tungsten oxide nanoparticles may be used for producing an energy efficient building glass – smart glass. And the raw material WO3 nanopowder is cathode electrochromic material that can be prepared by pulsed DC reactive magnetron sputtering method, wherein the metal W and tungsten-titanium alloy are used as targets. The so-called cathode electrochromic material means that the material is colorless in the high-valent oxidation state, and is colored in the low-cost reduced state. In addition to W, there are mainly Mo, Ti, and the like.

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While when it comes to energy-saving glass, at present, the most widely used one at home and abroad is passively regulated energy-saving glass, such as low-emissivity glass, solar control glass, vacuum glass, and insulating glass. That is to say, the visible light transmittance, heat transfer coefficient, sunshade coefficient and other performances in relation to glass lighting and energy saving of these types of glass are fixed. Therefore, it is impossible to actively control the spectral performance of the glass according to the changes of temperature, illumination and human comfort in order to maximize the use of solar energy and save energy consumption for cooling and heating. While the energy-saving glass of tungsten trioxide can actively regulate the spectral performance of the glass and reduce the cost of cooling and heating. Therefore, such heat insulating glass is also called smart glass, which is more and more widely used in the thermal insulation field of building.

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