Nano Cesium Doped Tungsten Oxide Applied for Transparent Thermal Insulation Material

Nano cesium doped tungsten oxide may be applied for producing transparent thermal insulation material. With the promotion of the heat insulation material, the preparation of cesium doped tungsten oxide powder is also more important. In this regard, experts have proposed a method for preparing Cs doped tungsten oxide powder by the following steps:

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Using sodium tungstate as raw material, to prepare sodium tungstate solution with a certain concentration. And the tungstic acid sol is obtained by cation resin exchange. Then, an appropriate amount of citric acid solution, ethanol and a certain concentration of cesium carbonate solution are added, and the mixture is uniformly stirred to obtain a precursor of hydrothermal reaction. For the solution, the precursor solution was prepared according to n(Cs):n(W)=0.3:1. The precursor solution with citric acid concentration of 0.36mol/L, 0.55mol/L, 0.73mol/L and ethanol volume percentage of 56% and citric acid concentration of 0.55mol/L was prepared separately, and the precursor liquid was placed in the autoclave and react at 190°C for 1-5d. The obtained precipitate is subjected to ultrasonic water washing, alcohol washing, centrifugation and drying treatment to obtain cesium doped tungsten oxide powder.

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