Cesium tungsten bronze nanopowder is an important dingal material for producing hotel heat insulating glass coating. Wherein, CsxWO3 nanorods with lengths of 10-60 nm can be prepared by controllable solvothermal reaction and a subsequent heat-treatment with citric acid thermolysis under a N2 atmosphere. According to the experts, such coating is developed to achieve simultaneously higher transparency and heat-shielding performance of CsxWO3 for energy-saving glass applications.
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The experts have proved that crystal growth could be controlled by using solid state gel-like tungstic acid as the W source and controlling the water content in the precursor solution. Meanwhile, the deposited carbon film on the particle surface due to thermolysis of citric acid during N2 heat-treatment could also inhibit the crystal growth. And the experts also found that the CsxWO3 coating film on a glass substrate from dispersion of CsxWO3 particles after N2 heat-treatment with citric acid thermolysis exhibited improved transparency and near-infrared (NIR) shielding ability. Particularly, the CsxWO3 particles synthesized using pure ethanol as the solvent exhibited the best visible light transparency and NIR shielding performance.
