Yellow Tungsten Oxide Nanopowder Applied for Smart Heat Insulation Window Glass

Yellow tungsten oxide nanopowder may be applied to smart heat insulation window glass, making it have excellent heat insulation and heat preservation performance. Specifically, it is necessary to study the preparation of a tungsten trioxide electrochromic film.

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For example, preparation of a small-area electrochromic film: 15mL of 0.5mg/mL nano-ink is sprayed on a hot-heated FTO conductive glass by a spray gun to obtain an electrochromic thin film of 2.5×3.5cm2. For another example, preparation of a large-area electrochromic film: 100mL of 0.5mg/mL nano-ink is sprayed on a hot-heated FTO conductive glass by a spray gun to obtain an electrochromic film of 10×10cm2. The size of the deposited film is mainly selected in accordance of the size of the laboratory hot stage of 15×15cm2. To prevent cracking of the FTO conductive glass due to uneven heating, the size of the prepared film must be less than 15×15cm2. Certainly, the preparation of the above films is based only on laboratory research. For large-scale application, these sizes are too small, so the research on actual use of large-area films will be carried out.

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