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.

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.

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.

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.