Cs doped tungsten oxide may be applied for producing a new type of environmentally friendly thermal insulation film. As a new type of infrared shielding material, this kind of thin film has been widely used in automotive glass and building glass. In this regard, the expert proposed a preparation method of the raw material cesium doped tungsten oxide nano powder, the specific steps are as follows:
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1.0 The reaction amount of the raw material tungsten salt and the cesium salt are respectively dissolved in a solvent, and the tungsten salt solution is configured into a tungstic acid solution through the exchange resin;
2.0 The tungstic acid solution, the cesium salt solution and the reaction solvent are mixed and continuously stirred at 50-80°C for 1-3 hours 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 reactants are stirred at 180-300°C for 5-20h;
4.0 After the hydrothermal reaction precipitate is repeatedly washed, it is dried, pulverized, and calcined to obtain Cs doped tungsten oxide nano particles.
The tungsten salt in the step 1.0 is any one of sodium tungstate, ammonium tungstate and potassium tungstate, the cesium salt is any one of cesium carbonate, cesium nitrate and cesium sulfate, and the solvent is any one of deionized water and absolute ethanol.
