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Molybdenum Disulfide (MoS2)

Molybdenum disulfide as a High-solid lubricants, it is more famous than WS2. MoS2 occurs as the mineral molybdenite. Natural amorphous form is known as more rare mineral jordisite. More so than other transition metal chalcogenides, MoS2 is unreactive, being unaffected by dilute acids. In its appearance and feel, molybdenum disulfide is similar to graphite and indeed it is widely used as a solid lubricant because of its low friction properties, sometimes to relatively high temperatures. MoS2 is diamagnetic and a semiconductor.

Molybdenite ore is processed by flotation to give relatively pure MoS2, the main contaminant being carbon. MoS2 also arises by the thermal treatment of virtually all molybdenum compounds with hydrogen sulfide.

Molybdenum disulfide sputtering target MoS2 targetMolybdenum disulfide is often a component of blends and composites where low friction is sought. A variety of oils and greases are used, because they retain their lubricity even in cases of almost complete oil loss, thus finding a use in critical applications such as aircraft engines. When added to plastics, MoS2 forms a composite with improved strength as well as reduced friction. Polymers that have been filled with MoS2 include nylon (with the trade name Nylatron), Teflon, and Vespel. Self-lubricating composite coatings for high-temperature applications have been developed consisting of molybdenum disulfide and titanium nitride by chemical vapor deposition.

Specific uses: It is often used in two-stroke engines; e.g., motorcycle engines. MoS2 is also used in CV and universal joints. During the war, the molybdenum disulfide product "Dri-Slide" was used to lubricate weapons, although it was supplied from private sources, not the military. MoS2-coatings allow bullets easier passage through the rifle barrel with less deformation and better ballistic accuracy.

Use in petrochemistry, Synthetic MoS2 is employed as a catalyst for desulfurization in petroleum refineries; e.g., hydrodesulfurization. The effectiveness of the MoS2 catalysts is enhanced by doping with small amounts of cobalt or nickel and the intimate mixture is supported on alumina. Such catalysts are generated in situ by treating molybdate/cobalt or nickel-impregnated alumina with H2S or an equivalent reagent.

Use in lubrication,There are currently no clear lubrication alternatives to molybdenum disulfide or the very similar tungsten disulfide that can resist temperatures higher than 350°C in oxidizing environments. Research has been conducted on compacted oxide layer glazes, which form during metallic surface sliding wear at several hundred degrees Celsius. However, because these oxide layers are physically-unstable, their use has currently not proven practical. Use as lubricant,MoS2 with particle sizes in the range of 1-100 μm is a common dry lubricant. Few alternatives exist that can confer the high lubricity and stability up to 350 °C in oxidizing environments. Sliding friction tests of MoS2 using a pin on disc tester at low loads (0.1-2 N) give friction coefficient values of <0.1.

Use in photocatalyst, some engineers has claimed that when combined with Cadmium sulfide it significantly increases the rate of photocatalytic Hydrogen production.

Basic Information
  • Color: black solid
  • Molar mass:160.07 g/mol
  • Odor:
  • Melting point/Melting range: 1185 °C decomp
  • Boiling point/Boiling range:Not determined
  • Flash point:Not applicable
  • Ignition temperature:Not applicable
  • Decomposition temperature: Not determined
  • Danger of explosion: .
  • Explosion limits: Not applicable
  • Vapor pressure:
  • Density: 5.06 g/cm3, solid
  • Solubility in / Miscibility with Water: Insoluble
  • CAS NUMBER: [1317-33-5 ]
Molybdenum Sulfide Sputtering Target (MoS2 target)

Purity --- 99.9%

Shape --- Discs, Plate,Step ( Dia≤ 600mm,Thickness ≥ 1mm)

                 Rectangle,Sheet,Step(Length≤ 600mm,Width ≤250mm,Thickness<≥1mm)

Application --- MoS2 thin film reduces friction, reduces abrasion, especially used in high temperature and oxidizing environments, generates more power, forms protective coating film, cools down the engine and avoids over-heat.

Molybdenum Sulfide Powder

Purity --- 99%,99.9%

Size --- 1-3um, 0.7um

Application --- used as raw material of sputtering target, other and in lubrication. High-solid lubricants




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