Cesium doped tungsten oxide powder for heat insulation coating may be prepared by the following steps:
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1.0 The reaction amount of the raw material potassium tungstate and cesium sulfate is dissolved in absolute ethanol, respectively, and the potassium tungstate solution is configured into a tungstic acid solution through an exchange resin;
2.0 The reaction solvent is prepared by dissolving diethylene glycol in absolute ethanol. The mass of the reaction solvent is 2.2 times the total mass of the tungsten salt and the cesium salt. The tungstic acid solution, the cesium sulfate solution and the reaction solvent are mixed and processed at 80°C. And then stirring under a water bath condition for 1h to obtain a hydrothermal reaction precursor liquid;
3.0 The precursor liquid is placed in a closed hydrothermal reaction kettle with a stirring device, and the reaction is performed at 220°C for 6h;
4.0 The hydrothermal reaction precipitate was repeatedly washed with deionized water, dried at 120°C for 10h, and then pulverized by a jet mill. The air pressure in the crushing chamber was controlled at 0.8MPa, and the pulverizing speed was set at 5000r/min. Finally, the powder was heated to 600°C at a rate of 6°C/min in a hydrogen atmosphere. And heat treatment was continued for 1h to obtain a nano cesium doped tungsten oxide powder.
