Cesium tungstate nanopowder for heat insulating window glass can be prepared by ultrasonic chemical method. And the obtained nano powder has small particle size, uniform dispersion, less agglomeration and high purity. Also, such preparation method is simple, efficient, reproducible and conducive to industrialization.
More details, please visit:
http://www.tungsten-powder.com/cesium-tungsten-bronze-chinatungsten.html
Preparation of Nano Cesium Tungstate by Ultrasonic Chemistry Method
1.0 According to n(cs)/n(w)=0.33:1, ammonium tungstate and cesium sulfate are dissolved in a citric acid solution and n-propanol solvent at a concentration of 1.5mol/L. After stirring uniformly, the reaction is carried out at 180-200°C for 2-3 hours to obtain a mixture of tungsten and cesium;
2.0 Add appropriate amount of urea to the mixture of tungsten and cesium, adjust the pH of the reaction solution to 3-5, stir until the urea is completely dissolved;
3.0 The mixed solution completely dissolved in step 2.0 is washed with argon gas, and subjected to chemical reaction by ultrasonic irradiation at 50-80°C under argon atmosphere for 2-6 hours to obtain a gelatinous precipitate; wherein the ultrasonic radiation frequency is 40.34kHz;
4.0 The gelatinous precipitate is aged for 4-24 hours, then filtered, washed, dried, and calcined to obtain nanometer cesium tungstate.
