Nano cesium tungsten oxide powder may be used for the preparation of thermal insulation paper, which is a new type of heat insulation film of high transparency. And such film is environmentally friendly with good near-infrared shielding property so that it may be applied to architectural glass. So, do you want to know the principle of near-infrared shielding of cesium tungsten oxide?
Generally, cesium tungsten oxide is a low-resistivity material. And there are a large number of free carriers presenting in the system. That is to say, cesium tungsten oxide has strong free carrier absorption. And free carrier absorption coefficient α is proportional to the free carrier concentration and the square of the wavelength of the absorbed light. Therefore, when the content of cesium in the cesium tungsten oxide increases, the concentration of free carriers in the system gradually increases, and the absorption enhancement in the near-infrared region is more obvious. Therefore, the near-infrared shielding performance of the cesium tungsten oxide is enhanced as the cesium content is increased.
More details, please visit:
http://www.tungsten-powder.com/cesium-tungsten-bronze-chinatungsten.html
