Cesium tungsten bronze is a type of infrared thermal insulation nano material, which can shield near-infrared light.
Inside the metal, free electrons may be considered as static, and a large number of free electrons form plasma with natural vibration frequency. When the natural frequency is close to the frequency of the incident light, acute coupling occurs to form plasma wave. Then, the energy of the incident light is largely absorbed by metal as the plasma waves are in the process of propagation. This is the plasma resonance effect.
The cesium tungsten bronze powder has a lot of free carriers, so it can have a similar effect to plasma resonance, which means that it has a coupling effect with the incident light, and plays a role in shielding the near-infrared light. And therefore, the infrared thermal insulation nano material of cesium tungsten bronze will be applied in many fields such as building glass (glass door, glass window, skylight and glass curtain wall, etc), auto glass and so on.
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