Violet tungsten oxide, mainly violet tungsten oxide nanoparticles, is a functional material that may be used to prepare a new type of environmentally friendly sunscreen film. The obtained transparent heat-insulating film can effectively shield ultraviolet rays. And the ultraviolet shielding rate is over 99%. Also, the heat insulation effect is good, and the infrared shielding rate is about 80%-95%. In a word, the thickness of tungsten oxide smart film is lower than that of traditional thermal insulation films, but its performances such as explosion-proof performance are improved.

Violet tungsten oxide may be used to prepare a new smart film - nano ceramic heat insulation film. It is reported that the earliest nano ceramic thermal insulation film is amber optical nano ceramic thermal insulating film developed by the Germans. While what should be noted is that the ceramic film of tungsten oxide is different from the German ceramic film.

Violet tungsten oxide is an important functional material for the preparation of a smart glass - a heat insulation UV resistant glass. We all know that although ultraviolet light has a bactericidal effect, it must be avoided in some occasions, including sunlight room, villas, shopping malls, hotels, exhibition halls, libraries, museums and high-end office buildings.

Doped tungsten oxide is an infrared shielding nano powder that can be used to produce transparent heat insulating materials for glass such as architectural glass, automotive glass, and train glass. This is a multi-doped tungsten oxide nano powder, whose expression is CsxSnyBizW(1-x-y-z)O3, wherein 0<x<0.3, 0<y<0.1, 0<z<0.1. By controlling the doping ratio, the infrared shielding performance and the visible light transmittance of the target product can be adjusted.