Nano Cesium Tungstate Applied for Ceramic Microsphere

Nano cesium tungstate may be applied for preparing ceramic microsphere, and therefore be widely used in the preparation of ceramics. In this process, cesium tungstate nano particles play a role of dispersion, grinding and stabilization. In this regard, experts said that in order to obtain cesium tungstate nanopowder with high-purity, uniform dispersion, less agglomeration and small particle size for producing ceramic, the following steps can be used:

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1.0 Weigh 1.47g of sodium tungstate and 0.97g of cesium carbonate, add citric acid solution at a concentration of 3mol/L and methanol reagent, stir evenly, and react at 200°C for 3 hours to obtain a mixture of tungsten and cesium;

2.0 Add 1.98g of urea to the mixture of tungsten and cesium, adjust the pH of the reaction solution to 4, stir until the urea is completely dissolved to form a transparent solution;

3.0 Stir the above solution to homogeneity 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 with a frequency of 20.5kHz for 4h to obtain gelatinous precipitate;

4.0 The gelatinous precipitate was aged for 5 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 kept at 600°C for 3 hours, and cooled to obtain nano cesium tungstate powder.