Nano Cesium Doped Tungsten Oxide Applied for Thermal Insulating Glass

Nano cesium doped tungsten oxide may be applied in thermal insulating glass to play a role of high heat insulation. According to experts, in the preparation process of cesium doped tungsten oxide, the absorbance of Cs doped tungsten oxide in the visible region and the short-wave near-infrared region gradually increases with the extension of the reaction time. The lowest point of absorbance occurs at the wavelength of 450nm. In the ultraviolet region and the short-wave near-infrared region, Cs doped tungsten oxide has a high absorbance. In a word, cesium doped tungsten oxide nano particles exhibit good ultraviolet absorption properties and short-wave near-infrared absorption properties.

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Experts said that the absorption edge in the ultraviolet direction is due to the intrinsic absorption of Cs doped tungsten oxide, which is mainly determined by the forbidden band width of cesium doped tungsten oxide powder. The absorption in the visible region and short-wave near-infrared may be related to the free carrier absorption in the cesium doped tungsten oxide system. And, in general, the free carrier absorption will be more obvious if the free carrier concentration is higher.

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