Blue tungsten oxide (BTO) is a kind of dark blue compound containing tungsten (VI) and tungsten (V) mixed valence state. It is the product of the action of reducing agent and tungsten compound. It is usually called blue tungsten, which is usually formed in solution. Blue tungsten oxide is one of the important raw materials for the manufacture of tungsten powder. The blue tungsten oxide in industry mainly refers to WO_2.90, and the tungsten W_2.72 is also classified as blue tungsten in the early stage.

Tungsten trioxide is both an n-type semiconductor material and a "d⁰" oxide. This dual identity allows tungsten oxide to have both catalytic, optical, and electrical properties. The formula of tungsten trioxide is quite simple, but its physical properties are very complicated. The structure of tungsten trioxide is not stable and unstable, this is closely related to its octahedral crystal structure and complex outer electronic structure, and also makes its electrical and optical properties exist in multiple states.

Tungsten oxide (YTO), also known as yellow tungsten oxide, formula WO₃, is the main tungsten oxide product in China in the 1980s. It is a yellow powder that is insoluble in water, soluble in alkali and slightly soluble in acid. Its density is 7.16 g / cm³; its melting point is 1473 °C; its boiling point is about 1700 °C. Mainly used in the system of high melting point alloys and cemented carbide, tungsten wire and fire gas sensitive materials, but also for photocatalyst materials.

Yellow tungsten oxide (YTO), an oxide of tungsten, with a yellow powder appearance and a chemical formula of WO₃, it is an important chemical raw material in the history of tungsten smelting in China.

The luminescence of OLED belongs to the laser luminescence. Laser luminescence can be divided into two kinds. One is a thin film laser light emitting plate (TFEL) made from element periodic table elements. The other is a light-emitting diode (LED) made of inorganic P and N type semiconductors.

Tungsten trioxide (WO₃) is a kind of extremely important high-tech materials, it has great potential in many areas of chemical, energy, electric power etc.