CsxWO3 powder, or cesium tungsten bronze powder, may be applied for producing thermal insulation film as the raw material CsxWO3 has excellent near-infrared shielding property. Studies have shown that cesium tungsten bronze has the ability to selectively transmit light waves. And generally, it meets the requirements of high visible light transmittance and low near-infrared transmittance. That is to say, the obtained heat-insulating film can shield the near-infrared light while ensuring high illumination, and dings as a new type of transparent heat insulation material. In a word, the near-infrared shielding property of cesium tungsten bronze makes it a very promising heat insulating material in building energy-saving glass.
Experts have studied the mechanism of CsxWO3 and found that it is the small surface polaron of the cesium tungsten bronze and the plasmon resonance that cause the near-infrared shielding performance. And the small polaron is generated by the lattice-entrained carriers in the cesium tungsten bronze in the surrounding lattice. The smaller the doping particles, the smaller the small bound of the constraint is. And it is more favorable to absorb light. In other words, CsxWO3 can have better the near-infrared shielding performance.
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