Experts have proposed a preparation method of cesium doped tungsten oxide nanopowder for ceramic microsphere. The specific steps are as follows:
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1.0 The raw material sodium tungstate and cesium nitrate are respectively dissolved in deionized water, and the tungsten salt solution is configured into tungstic acid solution through the exchange resin;
2.0 The tungstic acid solution, cesium salt solution and polyethylene glycol are mixed and continuously stirred under a water bath condition of 50-80°C for 1-3h to obtain hydrothermal reaction precursor liquid; the mass of polyethylene glycol is 1.5-3.0 times the mass of tungsten salt and cesium salt.
3.0 The precursor liquid is placed in a closed hydrothermal reaction kettle with a stirring device, and reacted at 180-300°C for 5-20h;
4.0 The hydrothermal reaction precipitate is repeatedly washed with deionized water, dried at 80-120°C for 8-12h, and pulverized by a jet mill, and then calcined. The air pressure in the crushing chamber is controlled at 0.5-1.0MPa, and the pulverization speed is set to 2000-5000rpm. The calcination process is carried out in a vacuum atmosphere, the temperature is raised to 300-800°C at a rate of 2-10°C/min, and the heat treatment is continued for 1-2h to obtain cesium doped tungsten oxide nano powder.
