Cesium tungstate for thermal insulation dispersion can be prepared by chemical vapor transport method. So, what is the chemical vapor transport method?
The so-called chemical vapor transport method is a solid or liquid substance A reacts with a gas B at a certain temperature to form a gas phase product, and the gas phase reaction product undergoes a reverse reaction at different temperature portions of the system. As a result, A is recovered. This process is like a sublimation or distillation process, but at such a temperature, substance A does not pass through a vapor phase it should have, so it is called chemical vapor transport method. To be specific, cesium tungstate nano powder is the solid substance A.
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In 1997, researchers had developed cesium tungsten bronze (CsxWO3) of special structure by chemical transfer of cesium tungstate and halogen compounds at different temperatures, and explored their optical properties at different temperatures.
