Some researchers prepared tungsten disulfide ultrafine powder by liquid phase precipitation method using sodium sulfide and sodium tungstate solution as raw materials. The obtained WS2 powder has good dispersion and uniform particle distribution.

High purity ultrafine tungsten disulfide refers to tungsten disulfide (WS2) powder with purity higher than 99.9% and small particle size. The specifications of high-purity ultrafine tungsten disulfide can be WS2 powder with a Fischer particle size F.S.S.S of 0.4-0.7μm, laser particle size of 3-4μm, or WS2 powder with a Fischer particle size F.S.S.S of 0.8-1.1μm and laser particle size of 9-10μm, etc.

High purity coarse tungsten disulfide powder refers to tungsten disulfide (WS2) powder with a purity greater than 99.9% and a larger particle size. The specifications of high-purity coarse tungsten disulfide can be WS2 powder with a Fischer particle size F.S.S.S of 1.9 μm and a laser particle size of 15-18 μm; Or WS2 powder with a Fischer particle size F.S.S.S of 3.8 μm and a laser particle size of 20-24 μm; Or a WS2 powder with a Fischer particle size F.S.S.S of 5.0 μm and a laser particle size of 25-28 μm, and so on.

Cemented tungsten carbide (W₂C) has attracted great attention due to its properties of high hardness and good wear resistance. It is mostly applied to the metallurgy, drilling, and mining industries under harsh conditions of high-pressure, high-temperature, and corrosive environment. The mechanical properties such as hardness, compressive strength, and transverse rupture resistance depend on the composition and microstructural parameters including the grain size. The reduction in scale of the microstructure also means an increase in the dislocation density and the amount of grain boundaries per unit area.