Nano CsxWO3 Powder Applied for Thermal Insulation Paper

Nano CsxWO3 powder, or nano grain size cesium tungsten bronze powder, may be applied for preparing thermal insulation paper. As you may have known, cesium tungsten bronze powder has excellent photochromic performance. Studies have shown that the cesium tungsten bronze has low discoloration time lag and excellent photochromic performance in both the ultraviolet and visible light bands.

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The photochromic properties of cesium tungsten bronze are derived from the fact that metal ions with a small radius in CsxWO3 can freely enter and exit in a nano cesium tungsten bronze tunnel structure. And such doping is reversible doping. When the doping amount of the metal ions is changed, the cesium tungsten bronze exhibits a correspondingly changed color. Tungsten oxide is colorless, and its film can absorb ultraviolet light waves with shorter wavelengths and electronic transition occurs. When a metal ion is doped and a defect occurs at an energy level at a low energy band, an electron transition phenomenon can be generated by excitation of visible light.

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