The specific steps for preparing cesium tungsten bronze nanopowders by citric acid-induced hydrothermal synthesis method and solvothermal liquid phase method are as follows:
- Heat and dissolve 400kgs sorbitol in a jacketed reactor, add tungstic acid and cesium sulfate, wherein the mass ratio of tungstic acid and cesium sulfate is 1:0.33, the quality of sorbitol is tungstic acid and cesium sulfate total mass 3 times.
- After stirring at high speed for 30 minutes, pump it into a homogenizer for circulation and homogenization. After 60 minutes, pump the product into a high-pressure reactor that has been heated to 150°C. Set the speed of the high-pressure reactor at 180r/min. After completely transferring to the autoclave, close the valves of the autoclave, gradually raise the temperature of the autoclave to 350°C, keep the temperature for 600min, and then cool down to 150°C. 3. Release the reaction product, add deionized water to it, put the material into a filter press, wash with deionized water and absolute ethanol until the sulfate content is lower than 100mg/kg, and the ethanol content is greater than 80%.
- Put the filter cake into a vacuum oven for drying, and then carry out mechanical pulverization and jet pulverization to obtain the target product—dark blue cesium tungsten bronze nanopowder.
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