Cesium tungsten bronze nanopowder, or CsxWO3 nanopowder, is a well-known NIR-shielding material for preparing office thermal insulating glass coating. So, the preparation method of cesium tungsten bronze has attracted much attention.
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According to the experts, the CsxWO3 nano particles can be prepared by hydrothermal method, using CsCl as a source, and ethyl alcohol as a reaction solvent. Then, how to prepare nano particle size cesium tungsten bronze by hydrothermal method? Some experts added half of the ethanol solution of tungstic acid sol in the 0.5 mol/L tungstic acid sol, then slowly added CsCl solution, and the mixed solution is charged into the autoclave, reacted at 200 °C for a period of time, and then the obtained blue precipitate of CsxWO3 was subjected to three times of ultrasonic water washing and three times of ultrasonic alcohol washing, and separated by low speed centrifugation and high speed centrifugation to obtain a pure blue precipitate, which was dried at 70 °C for 10 hours to obtain pure cesium tungsten bronze powder.
