CsxWO3 powder, or cesium tungsten bronze powder, may be used to prepare thermal insulation dispersion liquid. And the obtained dispersion liquid has high transparency and high heat insulating property so that it can be used for the production of architectural or automotive heat insulation products such as thermal insulation films.
Experts say that this is because nano grain size cesium tungsten bronze has a large number of free carriers, which can have a similar effect to plasmon resonance. Coupled with incident light, the dispersion liquid of cesium tungsten bronze may shield the near-infrared light with high heat insulation.
So what is plasmon resonance? Inside the metal, free electrons can be considered to be stationary, and a large number of free electrons form plasma with natural vibration frequency. When the natural frequency is close to the incident light frequency, a strong coupling phenomenon occurs, forming a plasma wave. And the energy of the incident light is largely absorbed by the metal during the propagation of plasma wave. This is the plasmon resonance.
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