Tungsten trioxide is an important inorganic photochromic material, which has wide application prospects in large screen display and high density information storage. Compared with organic photochromic materials, WO₃ has good stability and low cost, but its photochromic efficiency is poor. In order to improve the discoloration efficiency of this kind of inorganic materials, scholars at home and abroad have proposed various solutions and achieved many results.

The chemical properties of tungsten and molybdenum are similar, and they are often associated with each other in nature. In the current tungsten smelting process, the separation of tungsten and molybdenum has become a very important process, among which the selective precipitation method is the most concerned.

The crystals of CaWO₄, PbWO₄, NaBi (WO₄) ₂ and CaMoO₄ with Scheelite structure (ABO₄) are better scintillators or X-ray emitters. The results show that the molybdate and tungstate with Scheelite structure belong to tetragonal system, and their grains are tetragonal, biconical or plate-like. They are important photoelectric functional materials, scintillating materials and fluorescent materials.

Dropping is a consumable item in fishing, including weights on hooks for bottom sinking, weights placed in false baits, and more directly processed into false fishes, such as Luya.

Among many photocatalytic materials, bismuth tungstate is a kind of visible-light photocatalyst with good photocatalytic activity. Bi₂WO₆ is a typical semiconductor material. Electrons are stimulated by light and leave corresponding holes to form electron-hole pairs. These photogenerated electron-hole pairs have strong redox ability. They are easy to react with organic substances and polymer, and they respond well to visible light because of their narrow band gap.

Since the discovery of platinum-like catalytic performance by American scientists in the last century, tungsten carbide has been found to have high catalytic or catalytic activity in hydrocarbon reforming, decomposition, hydrogenation, isomerization, electrochemical oxidation of hydrogen and alcohols, and electrochemical reduction of oxygen.

Nitrogen oxide is a serious air pollutant, which can cause environmental problems such as acid rain and photochemistry smog. It can also cause direct harm to human respiratory system. To win the Blue Sky Defense War, the important task is to effectively control the emission of NO_x.

Nano tungsten-copper composites have excellent properties of tungsten and copper, and are widely used in electrode materials, electrical contact materials, electronic packaging materials and heat sink materials. However, the disadvantages of immiscible tungsten and copper elements, large melting point difference, poor wettability and low density after sintering lead to the decrease of properties and the increase of production cost of tungsten-copper composites.

Cesium tungstate (Cs₂WO₄) is a new material discovered in recent years. At present, some famous coating companies in Japan, Germany, the United States and other countries are vigorously developing transparent heat insulation coatings of cesium tungstate.

Tungsten trioxide (WO₃) is an important n-type semiconductor oxide. It has many crystal structures. It has been extensively studied because of its unique physical and chemical properties. It has been applied in the fields of electrochromic, photochromic, sensing and catalysis.