Cesium tungstate nanopowder may be used for the production of heat insulating products such as heat insulating film and coating, and therefore be applied to thermal insulating glass. In recent years, such glass has been well received by the public. Therefore, experts are paying more attention to the preparation of nano cesium tungstate. For example, some experts have proposed the following method: prepare a tungstic acid solution by sodium tungstate ion exchange, then dissolve the cesium carbonate to obtain a mixed solution, add citric acid as a reducing agent, and react in a 180-200°C high pressure reaction kettle for 1-3 days to obtain nano grain size cesium tungstate.
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Experts say that this method reduces the reaction pressure and improves the safety factor compared with the method using ethanol as solvent. However, it is undeniable that such preparation method also has shortcomings - the reaction time is up to 1-3 days. That is to say, the preparation method has low production efficiency and high production cost. Therefore, this method is not suitable for mass production and needs to be improved.
