Ultrafine/nanocrystalline cemented carbides overcome the contradiction between strength and toughness, have high toughness and wear resistance, and have become a hotspot in the field of cemented carbide technology in the world.

Bismuth tungstate is a new type of photocatalyst material, which is easily stimulated by visible light, can degrade organic pollutants. The reaction conditions are mild, the degradation is thorough, and the environment is clean. Bismuth tungstate has become one of the hot technologies in the field of pollution control.

Clean energy is one of the most important problems in the sustainable development of human society. Hydrogen is not only an ideal clean energy source, but also an important chemical raw material, which has attracted worldwide attention. On the other hand, hydrogen fuel cell has become one of the hotspots of new energy vehicles in the future due to its high energy, high efficiency and environmental friendliness.

Electrochromic means that the material has reversible color when applied voltage. Materials that can undergo reversible changes in optical properties (e.g., color) based on electrochemical redox reactions are called electrochromic materials. Tungsten oxide has become a hotspot in electrochromic research due to its excellent electrochromic properties.

Bismuth tungstate Bi₂WO₆ is a new photocatalyst material. Because of its non-toxicity, low cost, high stability, easy preparation and good visible light response, Bi₂WO₆ has broad application prospects in light, electrochromic materials, photoelectrochemical hydrogen production, photocatalytic degradation of organic compounds and solar cells.

Ultrafine cemented carbide has the advantages of high hardness, high strength and good toughness. It is called "double-high" cemented carbide, and is widely used in high-efficiency precision tools, micro-drills, micro-milling, blades, precision molds and so on.

Zinc tungstate (ZnWO₄) with wolframite structure is an important inorganic material. Because of its excellent chemical stability, high refractive index, high X-ray absorption coefficient, high quantum yield and good photoelectric activity, it is used in X^-, gamma-ray scintillators, photoluminescence, microwave systems, solid-state lasers, gas and humidity sensors, photocatalysis, acoustooptic fibers and magnetism. Materials and other fields have a wide range of applications.

Electrochromic phenomena refer to the reversible change of material color under external electric field. In recent years, more and more attention has been paid to electrochromic materials because of their great application prospects in stealth materials, smart chromic films and other fields.

Promoted by the vigorous development of petroleum processing industry, especially in the petroleum cracking and organic synthesis industries, the research and development of tungsten catalysts have received widespread attention. Ammonium metatungstate, as the most important precursor of tungsten-containing catalysts and tungsten metal, has the advantages of high water solubility and non-toxicity, so it is widely used as a tungsten source.

Tungsten oxide (WO₃), a yellow-green powder, is an important oxide of tungsten. At present, it is mainly used to manufacture W powder and WC powder, i.e. tungsten rod, tungsten wire and cemented carbide, which are the main terminal objects of tungsten oxide (WO₃).