Cesium Tungstate Nanopowder Applied for Thermal Insulation Masterbatch

Cesium tungstate nanopowder may be applied for producing thermal insulation masterbatch. With the promotion of this new functional masterbatch, the preparation of nano cesium tungstate is becoming more and more important. In this regard, some experts provide a method for preparing nano cesium tungstate, the specific steps are as follows:

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1.0 The reaction amount of ammonium metatungstate and cesium carbonate was dissolved in deionized water, and the solution was dried to obtain powder. The obtained powder was further pulverized to obtain a mixed powder of tungsten and cesium. Wherein, the pulverization may be carried out by a conventional pulverization method such as jet pulverization, etc. And the drying is also carried out by a conventional drying method such as oven drying;

2.0 The tungsten and cesium mixed powder was placed in a closed reaction vessel with stirring. The polyethylene glycol as a reaction solvent was added thereto, and the reaction was reacted at 320°C for 7 hours. The mass of the reaction solvent was 2.5 times the mass of the mixed powder of tungsten and cesium;

3.0 The reaction product in step 2.0 is separated by conventional separation method, and washed with deionized water or ethanol, dried, and pulverized by a jet mill to obtain nano cesium tungstate. Among them, the air pressure of the air bag of the crushing chamber of the jet mill is 1.1MPa, and the speed of the classifier of the jet mill is set to 1400r/m.

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