Cesium doped tungsten oxide nanopowder may be applied for producing nano-ceramic color master, which has been gradually recognized by experts due to the promotion of its application. At this time, experts considered: How to prepare nano cesium doped tungsten oxide with stable property? Is the process environmentally friendly? In this regard, they proposed the following preparation method, the steps are as follows:
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1.0 The raw material tungsten salt (ammonium tungstate) and cesium salt (cesium sulfate) are respectively dissolved in absolute ethanol, and the tungsten salt solution is configured into tungstic acid solution through an exchange resin;
2.0 The tungstic acid solution, cesium salt solution and reaction solvent (sorbic acid) are mixed and continuously stirred at 55-75°C for 1-3h to prepare hydrothermal reaction precursor liquid; the mass of the reaction solvent is 1.4-3.1 times the mass of ammonium tungstate and cesium sulfate;
3.0 The precursor liquid is placed in a closed hydrothermal reaction kettle with a stirring device, and the reaction is performed 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, then pulverized (in a jet mill) and calcined (in an argon atmosphere) to obtain Cs doped tungsten oxide nanopowder.
