Cesium tungsten bronze nanopowder, or Cs0.33WO3, or Cs0.32WO3, has been studied as an excellent NIR shielding material, for preparing heat-insulation coating, which can reduce the energy consumption for air conditioning and thereby decrease emission of carbon dioxide.

According to the experts, the size of cesium tungsten bronze nanoparticle has a significant effect on the haze of the transparent heat-insulation coating. And the visible light transmittance of the coating film is also directly related to the particle size of the cesium tungsten bronze. The larger the particle size, the lower the transmittance. Wherein, the haze of optical films is usually less than 1.0%.

Cesium tungsten bronze for preparing heat insulation window glass is nano particle size cesium tungsten bronze powder. This is because the cesium tungsten bronze nano particles have the ability to absorb near-infrared light, thereby achieving the purpose of heat insulation and consumption reduction. With the promotion of applications in the field of heat insulation, cesium tungsten bronze is known by more researchers. They begin to focus on the preparation of cesium tungsten bronze nanopowder.

How to prepare cesium tungsten bronze into a new type of environmentally friendly high-tech thermal insulation product - transparent nano heat-insulation film. Firstly, the cesium tungsten bronze nano powder should be made into cesium tungsten bronze nano slurry, and then the cesium tungsten bronze nano slurry is added to an acrylic emulsion, and coated on the surface of the PET film to form a heat-insulation film.