Tungsten oxide can be used to prepare an electrochromic film for use in assembling a complementary electrochromic device. According to the basic structure and working principle of the electrochromic window, the experts conceived that if a material with two or three functions of the five-layer film can be found, the five-layer electrochromic device can be simplified to four-layer or even three-layer structure.

WO3 film is used as an EC film that has a color-changing function in a five-layer film of an electrochromic smart window. So, do you know how the electrochromic window works? Experts take cathode coloring electrochromic materials as an example to introduce the working process of electrochromic devices.

Tungsten oxide, WO3-x, may be used to prepare transparent thermal insulation material for applying in architectural glass such as sun room, greenhouse, and glass windows of vehicles such as airplanes, to make these glasses have the characteristics of heat insulation, heat preservation and energy conservation, and environmental protection. With the promotion of its application, tungsten oxide nanopowder is becoming more and more known to people.

Tungsten trioxide can be prepared into a WO3 electrochromic film for applying in the preparation of a semisolid smart window. Specifically, some experts have obtained a tungsten oxide electrochromic film by radio frequency magnetron sputtering and a nickel oxide film by DC magnetron reactive sputtering.

WO3, more precisely, a tungsten trioxide film, is an important raw material for preparing an electrochromic smart window - one of the best electrochromic materials for preparing electrochromic devices. So, in general, what performance should the electrochromic window have?

Nano tungsten oxide may be used to prepare thermal insulation material such as thermal insulation dispersion, thermal insulation coating, and thermal insulation film. And these heat insulation materials have wide applications in construction and automotive glass where requiring high heat insulation and high transparency. In this regard, experts say that the tungsten oxide nanopowder needs to be reduced to WO3-x to have near-infrared absorption, that is, to exert thermal insulation performance. Because the optical properties of tungsten oxide powder are related to its phase and morphology, experts have conducted SEM analysis on tungsten oxide nanopowder before and after reduction. The figure below shows the SEM photograph of nano WO3 powder before and after reducing at 500°C for 2h.

Tungsten oxide can be applied to prepare an electrochromic film, and then be used to produce a new type of smart window, in which the WO3 electrochromic film plays a decisive role in the performance of the entire electrochromic window. In this regard, experts said that considering the performance, price and preparation process and other factors, from the current research results, tungsten oxide film is one of the best electrochromic materials.

Tungsten trioxide can be applied in the preparation of electrochromic smart window in the form of an electrochromic film. And the electrochromic window using WO3 film as an EC layer material is considered to be the most promising electrochromic device. However, at present, the research on smart windows is far less than the research on electrochromic materials. Although some samples of electrochromic windows have been developed, it is still necessary to make more in-depth research and improvement on its structure and manufacturing process in order to make it practical.

Amorphous WO3 film has a good electrochromic effect, so it is a well-known and the most widely studied electrochromic material, more specifically, an inorganic electrochromic material. So, why does an amorphous tungsten trioxide film have a good electrochromic effect?

Tungsten oxide, WO3-x, may be used to prepare thermal insulation material such as transparent heat insulation film, environmentally friendly thermal insulation coating, and smart windows, etc. As the research progresses, these energy-saving materials are gradually entering people's lives. These thermal insulating materials will be used in energy saving reconstruction of building. Therefore, more and more experts and scholars are beginning to become familiar with tungsten oxide. For example, some experts used XD-3 polycrystalline X-ray diffractometer to measure the X-ray diffraction (XRD) spectrum of the tungsten oxide nanopowder obtained by the experiment.