Tungsten Bronze Applied for Transparent Heat Insulation Coating

Tungsten bronze is a selective light-transmitting material (near-infrared shielding material) with the formula of CsWO3, which is often used to prepare transparent heat insulation coating, so that the resulting coating can achieve high transparency while exert excellent heat radiation shielding performance in the entire infrared light region (780- 2500 nm). And therefore, such a coating is often applied to sunrooms, office, living rooms and many other places.

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According to the experts, it is the local surface plasmon resonance effect between the incident light and the free electrons on the surface of the material and the small polaron absorption mechanism that make tungsten bronze can achieve high visible light transmittance while having excellent shielding ability in the entire infrared light region, especially can reduce the near-infrared light transmittance in the 900-1200 nm band to less than 10%. Therefore, tungsten bronze is considered as an ideal functional material for producing transparent thermal insulation coatings.

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