Nano cesium tungstate for thermal insulation dispersion can be prepared by hydrothermal/solvent thermal synthesis method. As you may have known, the liquid phase method has been widely used in all methods for preparing nanoparticles. The liquid phase method has the advantages of simple process, low industrial cost, and easy control of product composition. Among them, the hydrothermal synthesis method and the solvothermal synthesis method are the most important methods in the liquid phase method. And the solvothermal method was developed on the basis of hydrothermal method. The main difference between the two is that the solvent used in the hydrothermal process is water and the solvent used in the solvent process is organic.
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Specifically, some experts use WCI6 and CsOH as raw materials to prepare cesium tungstate by low-temperature solvothermal reaction. They first dissolve the two materials in absolute ethanol, and then reacting in a 200°C high-pressure reactor for 12h, and the obtained precipitated product is further treated by a thermal reaction at 500-900°C in an N2 atmosphere to obtain cesium tungstate powder.
