Cesium tungsten bronze can be applied for heat insulating window glass as it can effectively shield ultraviolet rays and infrared rays to alleviate hot temperature in the car caused by summer sun exposure, thereby effectively reducing the energy consumption of air conditioner and improve the comfort of human body.
For transparent heat insulating coating, it is generally required to satisfy the requirement that the transmittance of visible light at 550nm is 70%, the blocking ratio at 950nm is higher than 90%, and the haze is less than 1%.
Studies have shown that the main mechanism of infrared shielding of cesium tungsten bronze is the local surface plasmon resonance effect and the small polaron absorption mechanism, and its transparent heat insulation performance shows the significant size effect. In other words, the transparent heat insulation performance of cesium tungsten bronze crystal is significantly enhanced with the decrease of crystal size. Therefore, preparation and morphology control of nano grain size cesium tungsten bronze crystals are the research focus in this field.
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