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WS2-Tungsten disulfide

  • Molecular weight: 247.9
  • Colour: black gray
  • Sulfur content: ≥24.8%
  • Density : 7.6g/cm3
  • Melting point: 1250℃
  • Boiling point: 1872℃
■ Specifications

Tungsten disulfide, a kind of black gray solid powder, may be used as additive of high-temperature lubricating grease. The lubricating grease added with WS2 powder is featured with good performance such as high dropping point, high oil film strength and low coefficient of friction, etc., and applied to solid lubrication in fields such as spaceflight (only WS2 can resist the temperature from -270℃ to 1300 ℃ in universe lubrication), aviation and military, etc.

The tungsten disulfide compound by our company based on new techniques is featured with high purity, even size distribution, large specific area, high surface activity and low apparent density, etc. 

Performance comparison among tungsten disulfide, molybdenum disulfide and graphite

Tungsten disulfide is featured with outstanding lubricating property on conditions of heavy load, vacuum and high temperature. The following performance table shows that, on conditions of high temperature, tungsten disulfide has magnificent heat stability and inoxidizability, and the heat stability of tungsten disulfide is 93℃ higher than that of molybdenum disulfide ; and the higher friction coefficient of tungsten disulfide is, the lower load is. 



Contrast table of average coefficient of friction (μ) and grinding crack diameter (mm) of WS2, molybdenum disulfide and graphite.




■ Technical Data


■ Inquiry
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