Cesium Tungsten Bronze Applied for Heat-insulating Anti-explosion Coating

Cesium tungsten bronze for producing heat-insulating anti-explosion coating has high light absorption performance in the near-infrared region. Specifically, the expert obtained cesium tungsten bronze powder by a preparation method in which the obtained powder had an absorbance at a wavelength of 928 nm in the near-infrared region of 1.41 and a minimum absorbance at a wavelength of 437 nm.

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Experts introduced a preparation method of cesium tungsten bronze powder, the steps are as follows as:

Step One: Take 60ml of 0.5mol/L tungstic acid solution, put it into a beaker, add 37.8g of citric acid once in stirring, stir evenly, slowly add 15ml 0.35mol/L of cesium carbonate solution, then add 90ml of absolute ethanol, stirring for 1h, to obtain the reaction precursor solution. The concentration of tungstic acid in the precursor is 0.18mol/L, the concentration of citric acid is 1.10mol/L, the volume ratio of alcohol to water is 3:2;

Step Two: The above prepared reaction precursor solution was transferred into three 100 ml autoclaves in three groups, and continuously reacted at 190 °C for 3 d;

Step Three: The precipitate was washed with water and alcohol three times in sequence, and after centrifugation, it was dried at 50 °C for 10 h to obtain a dark blue powder with a crystal phase of hexagonal Cs0.32WO3.

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