Cesium tungsten bronze is a photochromic material with good photochromic properties, so it can be used to prepare a variety of transparent heat insulation materials including thermal insulation coatings, thermal insulation films and heat insulating glasses. And these functional materials are widely used in the glass windows or glass doors of the buildings or cars to play the role of heat insulation and heat preservation, thereby reducing energy consumption and reducing cooling and heating costs. Cesium tungsten bronze is one type of photochromic materials, and cesium tungsten bronze is the most well-known one.

Cesium tungsten bronze nanopowder is a functional material with strong absorption of near-infrared light and high visible light transmittance. So, it is also known as a near-infrared shielding material. It is commonly used to prepare transparent heat insulation materials for saving energy. And therefore the application prospects of cesium tungsten bronze in the field of building energy-saving renovation and automotive glass insulation are very broad. Therefore, cesium tungsten bronze has been paid more and more attention by experts and scholars.

It is reported that the experts first make the nano cesium tungsten bronze into the CsxWO3 slurry, and then the obtained slurry is made into the transparent heat-insulating coating, and finally, it is sprayed onto the glass windows or glass doors of the living room to obtain the living room thermal insulating film - a smart film.

Nano cesium tungsten bronze is mainly used to produce bathroom thermal insulating film. The prepared film is a smart film that has the advantages of high heat insulation, high heat preservation, high UV shielding performance, good anti-glare function and high visible light transmittance, so it has been accepted by the public.