Tungsten oxide, as an intermediate oxide of tungsten, is different from a compound having a classical stoichiometric structure and has a composition deviating from the integrality and point defects.

Tungsten oxide thin film noble metal doping principle is tungsten oxide thin film doped with other elements such as precious metals or compounds, the tungsten oxide film to produce specific electrical, magnetic and optical properties of the process. The tungsten oxide thin film for noble metal doping modification is to improve the performance of tungsten oxide film, a widely used method of important. The different noble metal doping elements or compounds on the tungsten oxide film caused by the optimization mechanism and effect is very different.

As a semiconductor oxide, tungsten oxide thin film materials have been widely used in many fields such as photocatalytic materials and color changing materials because of their excellent electrical and optical properties such as chemical or mechanical sensors, selective catalytic, environmental and industrial gas detection.

Tungsten oxide thin film is a new functional material that is a kind of thin film tungsten oxide which has excellent application prospect in many new fields with potential for development, such as smart windows, flat panel displays, gas sensors, solar cells and energy storage devices, etc. which have excellent color changing properties. Different tungsten oxide films have different surface morphologies, so various types of tungsten oxide films have somewhat different properties.

Violet tungsten oxide (WO_2.72) is one of the most widely used raw materials in the production of tungsten powder. Usually ammonium paratungstate is as raw material calcined in a rotary kiln derived. Violet tungsten oxide is an intermediate product with a special surface, fine needle structure and high chemical activity of tungsten. Because tungsten carbide (WC) powder prepared by using violet tungsten oxide has fine and uniform particle size, narrow particle size distribution and no structural agglomeration, it is a product with uniform properties and high quality. Therefore, violet tungsten oxide is suitable for the production of fine tungsten powder.

Tungsten oxide photocatalyst is an environmentally friendly materials and catalysts commonly used in decoration to remove formaldehyde and other gas pollution. Tungsten oxide photocatalyst mainly react with ultraviolet light, play a role in decomposing and catalyzing harmful gas in interior decoration. Photocatalyst was invented in Japan in 1968, and is now widely used in the field of decontamination of walls, floors, furniture and automobiles. This is the only product that can continuously purify harmful gases such as formaldehyde without the need of extra energy by relying on natural light. Different from the traditional titanium dioxide photocatalyst, tungsten oxide photocatalytic purification effect is titanium dioxide photocatalyst 7 times.

Tungsten bronze (TB) is a typical non-stoichiometric compound whose formula can be written as MXWO3. Of these, M is the first, second main group of elements and rare earth elements of tungsten bronze. Tungsten bronze has a special spatial tunnel structure, usually in accordance with the structure of the crystal classification. In tungsten bronze, The tunnel structure and this particular valence make it excellent in properties such as electron and ion conductivity, superconductivity, optical properties and the like, which is also widely used in secondary batteries, electrochromic and chemical sensors and the like.

Nano-tungsten oxide is a kind of semiconductor functional material with catalytic, invisible features, electrochromism, superconductivity and many other features. There are more studies on the electrical properties and photocatalytic properties of nano-sized tungsten oxide. However, the research on the optical properties of nano-sized tungsten oxide and its semiconductor nano-particles has yet to be developed and applied. Using liquid phase technology is the main preparation of nano-tungsten oxide, such as: precipitation, hydrothermal method, microemulsion method, sol-gel method.

Nano-tungsten carbide powder is a high purity, uniform particle size, good dispersion and high surface energy and chemical activity of the material, it is also a high acid resistance, hardness, insoluble in cold water and other new properties of high performance materials. Nano-tungsten carbide powder is mainly used in the production of hard alloy and a variety of hard surface materials.

It is well known that tungsten powder and tungsten carbide powder prepared from tungsten are not only the main raw material of cemented carbide, but also the main raw material of tungsten alloy with high content. The use of tungsten as an additive material is very versatile and has been used in the fields of machining, mining, geological drilling, construction tools, and military applications.