Tungsten disulfide is a common compound of tungsten and sulfur, which is composed of one tungsten atom and two sulfur atoms. Tungsten disulfide chemical formula is WS2, the crystal structure is layered structure, and it has good thermodynamic, optoelectronic and catalytic properties.
Tungsten disulfide Properties Low friction coefficient
The dynamic coefficient of tungsten disulfide (WS2) is 0.030 and the static coefficient is 0.070 to 0.090. Pressure, surface finish and surface hardness affect these results. Extensive real-time, real-life wear shows little change over time, unless severe overload conditions are introduced.
Chemical stability
Tungsten disulfide (WS2) is inert, non-toxic and non-corrosive. WS2 can be applied to all stable metal substrates. It is not affected by most solvents, refined fuels and chlorinated solvents. It is eroded by fluorine, sulfuric acid and hydrofluoric acid as well as hot caustic solutions. WS2 is corrosion resistant, but it can not restrain the effect of corrosion on inherently low resistance materials.
Compatibility
WS2 is successfully used in petrochemical oils and greases, synthetic oils, silicone lubricants and hydraulic oils. It has an affinity for lubricants and strives to maintain the fluid power layer.
High operating temperature
The operating temperature of WS2 is -460 °F to 1200 °F in normal atmosphere and 2400 °F in vacuum. There is an oxidation threshold at about 825 °F, which is very slow compared with other lubricants. The exhaust characteristics are also very low. The high temperature resistance of tungsten fluoride makes it ideal for bolts, studs and shafts in engine exhaust systems of all types of vehicles.
What is tungsten disulfide used for? As petroleum catalyst:
WS2 can be used as a catalyst for hydrogenation, desulfurization, polymerization, reforming, hydration, dehydration and hydroxylation because of its excellent cracking performance, high catalytic activity and long service life.
As solid lubricant:
The friction coefficient of WS2 is between 0.01 and 0.03, and the compressive strength is as high as 2100MPa. It has the advantages of wide use temperature, long lubrication life, low friction factor, good acid and alkali resistance, good corrosion resistance, good load resistance, etc., so it is often used as a solid lubricant for high temperature, high pressure, high speed, high load and transportation equipment in chemical active media.
As energy storage electrode material:
WS2 is a kind of layered material, which is connected by WMurS covalent bond in the layer and van der Waals force between layers, and the distance between layers is moderate, so it has good thermochemical stability, lithium storage performance and fast electron transfer rate, which can effectively improve the energy density and structural stability of electrode materials.
Chip transistors:
WS2 is a low-dimensional transition metal semiconductor material that makes semiconductor devices with stronger data processing and storage capabilities.
As an additive for high-performance lubricating oil:
It is found that adding an appropriate amount of WS2 nanoparticles to the lubricating oil can greatly improve the lubrication performance of the lubricating oil, reduce the friction coefficient by 20%-50%, and increase the oil film strength by 30%-40%. Its lubrication performance is much better than that of nano-MoS2.
Tungsten disulfide Price
The price is influenced by many factors including the supply and demand in the market, industry trends, economic activity, market sentiment, and unexpected events.
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Tungsten disulfideSupplier
Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) is a trusted Tungsten disulfide manufacturer and Tungsten disulfide supplier with over 12-year-experience. We ship our goods all over the world.
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