Nano cesium tungsten bronze, or nano CsxWO3, has excellent NIR shielding properties so that it is regarded as the best raw material for producing explosion-proof heat insulation coating. It is well known that nanoparticles of noble metals, rare-earth hexaborides, tin-doped indium oxide (ITO), etc., can shield NIR light due to the effect of the plasma vibration of the free electrons. However, because of their low visible light transparency or limited cover range of wavelength, new IR responsive materials development is required.

Nano cesium tungsten bronze is a new type of functional materiel for preparing heat-insulating anti-explosion coating. The near infrared light (NIR), which is also called as heat ray, consisted of the wavelength in the range of 780-2500 nm and takes up to 50% of the energy of sunlight. Therefore, the development of heat-insulating coating with high transmittance of visible light and high absorptivity of NIR is of great significance from the considerations of energy conservation and environmental preservation.

Nano cesium tungsten bronze is an environmentally friendly nano material that has high purity, low degree of agglomeration and excellent near-infrared shielding properties, so it can be used to prepare glass dome thermal insulating film, thereby reducing light pollution, reducing energy consumption and improving living environment.

Nano cesium tungsten bronze is a new nanomaterial with excellent infrared absorption properties so that the exhibition hall thermal insulating film prepared using such functional material as raw material has high visible light transmittance of over 71% and low infrared light (800-2500nm) transmittance of 13.5%. Some experts prepared the cesium tungsten bronze nano powder by solvothermal process using tungstic acid and cesium sulfate as raw materials, and sorbitol as solvent at 350 °C.