Cesium doped tungsten oxide powder may be applied for preparing thermal insulation film. Among them, the cesium doped tungsten oxide used is nano grain size cesium doped tungsten oxide. And the obtained heat insulating film can be used for thermal insulation of automobile glass and architectural glass. According to the literature, the thermal insulation film of nano cesium doped tungsten oxide can block most of the infrared rays. And the infrared blocking rate is over 80%.
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In other words, this kind of heat-insulating film can block most of the infrared light from the outside of the building or the car. So, there is no strong burning sensation in the building and in the car during the hot summer. The thermal insulation properties of this kind of thermal insulation film mainly depend on the reflection and absorption capacity of cesium doped tungsten oxide nano particles. The stronger the reflection absorption capacity, the higher the heat insulation rate. In addition, the heat insulation film is easy to operate with significant heat insulation effect.