Cesium tungstate may be applied for preparing infrared thermal insulation nano material. And the prepared thermal insulation material can be used in the heat field such as building glass and vehicle glass. With the popularity of this kind of heat insulation material, manufacturers are paying more and more attention to how to prepare nano cesium tungstate powder with high purity, uniform dispersion, less agglomeration and small particle size to produce material with excellent thermal insulation property. The following is mainly a method for producing nanometer cesium tungstate powder.
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Preparation of Nano Grain Size Cesium Tungstate Powder
1.0 Weight 1.76g of ammonium paratungstate and 1.30g of cesium nitrate, adding with a citric acid solution and a n-propanol reagent at a concentration of 1mol/L, stirring uniformly, and reacting at 190°C for 2.5 hours to obtain a mixture of tungsten and cesium;
2.0 Add 2.4g of urea to the mixture of tungsten and cesium, adjust the pH of the reaction solution to 5, stir until the urea is completely dissolved to form transparent solution;
3.0 Stir the above solution uniformly and then wash with argon for 30min, then insert the ultrasonic probe at 90°C under the protection of argon gas, and irradiate with ultrasonic wave at a frequency of 30.10 kHz for 6h to obtain gelatinous precipitate;
4.0 The gelatinous precipitate was aged for 24 hours, filtered under reduced pressure, and washed twice with distilled water, and then washed with a 10% by volume ethanol solution until the filtrate was neutral, and finally washed twice with absolute ethanol; The precursor was dried at 80°C for several hours, and then ground into powder. The powder was placed in a muffle furnace, and incubated at 650°C for 3 hours, and cooled with a furnace to obtain nano cesium tungstate powder.
