Cesium tungstate powder, mainly cesium tungstate nano particles, which may be applied for preparing nano-ceramic color master. And the color master requires that the cesium tungstate nanoparticles have the advantages of high purity, uniform dispersion, less agglomeration, and small particle size. In this regard, experts have indicated that the following preparation method can produce the nano cesium tungstate powder as required above.
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Preparation of Nano Cesium Tungstate Powder
Step one: Weigh 1.18g of sodium tungstate and 0.65g of cesium sulfate, add citric acid solution and ethanol reagent at a concentration of 5mol/L, stir evenly, and react at 180°C for 2 hours to obtain a mixture of tungsten and cesium;
Step two: Add 1.56g of urea to the mixture of tungsten and cesium, adjust the pH of the reaction solution to 3, stir until the urea is completely dissolved to form a transparent solution;
Step three: Stir the above solution uniformly and then wash with argon for 10min, then insert the ultrasonic probe under the protection of argon gas at 70°C, and irradiate with ultrasonic wave at a frequency of 24.45kHz for 2h to obtain a gelatinous precipitate;
Step four: The gelatinous precipitate was aged for 4 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 obtained precursor was dried at 80°C for several hours, and then ground into powder. The powder was placed in a muffle furnace and kept at 700°C for 5 hours, then cooled with the furnace to obtain nano cesium tungstate powder.
