CAS · 12138-09-9
Product Overview
Tungsten disulfide is a high-purity catalysts-auxiliary-agent supplied for industrial and specialty chemical applications. Contact our team for specifications, packaging options and lead times.
Product Specifications
| Appearance: | Gray-black powder |
|---|---|
| WS2 content (As W, wt): | 99.9% min |
| W content (In WS2, wt): | 73.77%–74.27% |
| Fe (wt): | 0.003% max |
| Cd (wt): | 0.002% max |
| Cu (wt): | 0.003% max |
| Mg (wt): | 0.002% max |
| Mo (wt): | 0.002% max |
| Pb (wt): | 0.002% max |
| TS (wt): | 0.03% max |
| H2O (wt): | 0.1% max |
| D50: | 10±5 μm |
Applications
1. Solid Lubricant
Industrial Machinery: WS₂ is widely used as a dry lubricant for components operating under high temperature (up to ~500°C) or vacuum conditions, where oil or grease cannot be used.
Aerospace and Automotive: Applied as a coating or additive in parts such as gears, bearings, pistons, and valves to reduce wear and friction.
Mold Release Agent: Used in plastic and rubber molding processes to facilitate easy demolding and extend mold life.
2. Additive in Greases and Oils
Improves the anti-wear, extreme pressure, and load-carrying properties of traditional lubricants.
Ensures longer service life of lubricated parts under extreme environments.
3. Nanotechnology and Electronics
2D Materials Research: As a member of the TMD family, WS₂ nanosheets are studied for applications in field-effect transistors, photodetectors, and flexible electronics.
Energy Storage: Used in lithium-ion battery electrodes and supercapacitors due to its layered structure and high surface area.
Catalysis: Explored as a hydrodesulfurization catalyst and in other electrocatalytic processes like hydrogen evolution reaction (HER).
4. Coatings and Films
Vacuum Coatings: Thin WS₂ films are applied via PVD (physical vapor deposition) or CVD (chemical vapor deposition) for durable, low-friction surfaces.
Biomedical Devices: Investigated for biocompatible coatings that reduce friction in implants and surgical tools.
Benefits
Exceptional Lubricity: Coefficient of friction as low as 0.03 under dry conditions.
High Temperature Stability: Effective performance up to ~500°C in air and even higher in inert atmospheres.
Chemically Inert: Stable against most acids and solvents, enabling use in harsh chemical environments.
Anti-Wear and Load Resistance: Enhances mechanical durability of components.
Nanomaterial Potential: Tunable electrical, optical, and mechanical properties for advanced functional devices.
Conclusion
Tungsten disulfide (CAS 12138-09-9) is a high-performance material offering outstanding lubrication and mechanical protection in extreme conditions. Its role as a solid lubricant and nanomaterial has led to increasing use in aerospace, automotive, manufacturing, electronics, and energy sectors. With the advancement of nanotechnology and surface engineering, WS₂ continues to gain attention for cutting-edge applications where conventional materials fall short.
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