Cesium tungsten bronze powder may be used as transparent material with heat-insulating performance, which has wide application prospects in the field of automotive glass and window glass of building for thermal insulation. It is also energy saving.
Preparation of Cesium Tungsten Bronze Powder
1. Prepare sodium tungstate solution with a concentration of 0.5mol/L using AR sodium tungstate (Na2WO4?2H2O) as raw material, and obtain tungstic acid sol by cationic resin exchange, then add AR citric acid at a concentration of 1mol/L or 2mol/L and cesium carbonate (Cs2CO3, AR) solution at a concentration of 0.3mol/L, stir the solution completely to obtain the precursor solution for hydrothermal reaction.
2. The precursor solution was placed in a high pressure reactor and reacted at 190°C for 3 days, ultrasonic washing, alcohol washing, centrifugation, and drying to obtain CsxWO3 powder.
Preparation of CsxWO3 Thin Film
The CsxWO3 powder was fully ground and carried out ultrasonic dispersion in a citric acid solution for 1 hour, then added into 0.1g/mL polyvinyl alcohol (PVA) solution, stir in a water bath at 80°C for 30 minutes, aged for 1 day to obtain the latex. CsxWO3 film was prepared on glass slides by sol-gcl dip-coating method.
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