Nanometer cesium tungsten bronze is an inorganic nano-material that has a good absorption effect on near-infrared rays, and thus it may be used as a raw material for preparing ceramic microsphere such as heat insulating ceramic microsphere. Therefore, such dingal ceramic microsphere may be applied to automobile film, transparent heat-insulating architectural window film, building coatings, and so on.
The reason why the nano grain size cesium tungsten bronze powder has good heat insulating effect is because the powder has infrared absorption property. The powder particles are uniform and the dispersion is good. Thus, the obtained new ceramic dingal material has strong absorption in the near-infrared region (at the wavelength of 800-1200nm) and high transmittance in the visible light region (at the wavelength of 380-780nm). In addition, the infrared absorption of the ceramic particles at 950nm can reach more than 90%, and the visible light transmittance at 550nm reaches 70% or more.
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