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Can high quality molybdenum disulfide be used in bearings?

2024-01-23 20:30:01  News

Molybdenum disulfide overview

Molybdenum disulfide is an inorganic substance with the chemical formula MoS2 and is the main component of molybdenite. Molybdenum disulfide is a black solid powder with metallic luster. Its chemical formula is MoS2 and it is the main component of molybdenum ore. Black solid powder with metallic luster and smooth feel. The specific gravity is 4.8 and the Mohs hardness is 1 to 1.5. Generally, the friction coefficient is 0.05~0.09. The oil absorption value is 1~1.5. Melting point: 1185℃, sublimation at 450℃. In the atmosphere, the temperature begins to gradually oxidize at around 400°C. As the particle size becomes finer, the oxidation temperature gradually decreases, and the oxide is molybdenum trioxide. Insoluble in dilute acids, dilute alkalis, solvents, petroleum, and synthetic greases. Can be corroded by aqua regia, concentrated sulfuric acid and boiling concentrated hydrochloric acid. Strong chemical and thermal stability. It does not react chemically with general metal surfaces and does not corrode rubber materials.

What is the operating temperature and application industry of molybdenum disulfide grease

Molybdenum disulfide grease is a commonly used high-temperature lubricant. Its operating temperature and range depend on the type of base oil.

Lithium molybdenum disulfide-based grease, produced from mineral oil and operating in the temperature range of -20°C to 120°C, is the most common type. Higher grades of molybdenum disulfide greases use complex soaps called molybdenum disulfide facility lithium oils, and their operating temperature grades range from -20°C to 160°C. This composite type of molybdenum disulfide lubricant is used in practical applications. The most extensive.

Can high quality molybdenum disulfide be used in bearings?

In addition, there are fully synthetic high-temperature greases made from molybdenum disulfide produced from synthetic base oils, with an operating temperature range of -40°C to 220°C. This grease is not used much, but its performance is impressive.

Molybdenum disulfide grease is suitable for a variety of applications including automotive, construction and mining, agricultural equipment, bearings and ball joints, and universal joints. It resists wear, oxidation and the ability to withstand shock loads, providing excellent lubrication for a variety of industrial and vehicle applications.

However, please note that molybdenum disulfide extreme pressure grease is not suitable for lubrication of constant velocity joints on front-wheel drive vehicles. During use, we need to select the appropriate molybdenum disulfide grease according to specific working conditions and needs to ensure the best lubrication effect.

Uses of molybdenum disulfide

Molybdenum disulfide is an important solid lubricant, especially suitable for high temperatures and high pressures. It is also diamagnetic, can be used as a linear photoconductor and a semiconductor showing P-type or N-type conductivity, and has rectification and energy conversion functions. Molybdenum disulfide can also be used as a catalyst for the dehydrogenation of complex hydrocarbons.

Also known as the "King of Advanced Solid Lubricants". Molybdenum disulfide is a solid powder made from natural molybdenum concentrate as raw material, chemically purified and changed in molecular structure. The product is black with a slight silvery gray color, has a metallic luster, feels smooth and is insoluble in water. This product has the following advantages: good dispersion and non-stickiness. It can be added to various greases to form a non-stick colloidal state, which can increase the lubricity and extreme pressure properties of the grease. It is also suitable for high temperature, high pressure and high pressure applications. occasion. The main function of molybdenum disulfide used in friction materials is to reduce friction at low temperatures and increase friction at high temperatures. It has small loss on ignition and is a volatile material in friction.

Friction reduction: Molybdenum disulfide processed by supersonic jet pulverization has a particle size of 325-2500 mesh, a micro-particle hardness of 1-1.5, and a friction coefficient of 0.05-0.1. It can be used in friction materials to reduce friction;

Increase friction: Molybdenum disulfide is not conductive and is a copolymer of molybdenum disulfide, molybdenum trisulfide and molybdenum trioxide. When the temperature of the friction material rises sharply due to friction, the molybdenum trioxide particles in the copolymer expand as the temperature rises and increase the friction force;

Anti-oxidation: Molybdenum disulfide is produced through chemical purification and comprehensive reaction. It has a PH value of 7-8 and is weakly alkaline. It covers the surface of friction materials and protects other materials from being oxidized, especially making other friction materials less susceptible to oxidation. Fall off to enhance adhesion;

In addition, molybdenum disulfide can also become a new material for making transistors. Compared with graphene, which is also a two-dimensional material, molybdenum disulfide has an energy band gap of 1.8 eV, while graphene has no energy band gap. Therefore, molybdenum disulfide may have broad application space in the field of nanotransistors. Moreover, the electron mobility of a single-layer molybdenum disulfide transistor can reach about 500 cm^2/(V•s), and the current switching rate can reach 1×10^8.

Molybdenum disulfide price

The price of molybdenum disulfide changes randomly with production costs, transportation costs, international conditions, exchange rates, and the supply and demand relationship in the molybdenum disulfide market. Tangji New Materials Co., Ltd. aims to help various industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full set of customized services. If you are looking for molybdenum disulfide material, please feel free to contact to get the latest molybdenum disulfide price.

Molybdenum disulfide supplier

As a global molybdenum disulfide supplier, Tanki New Materials Co., Ltd. has extensive experience in the performance, application and cost-effective manufacturing of advanced engineering materials. The company has successfully developed a series of powder materials (zinc sulfide, tungsten sulfide, bismuth sulfide, etc.), high-purity target materials, functional ceramics and structural devices, and provides OEM services.

Parameters of molybdenum disulfide MoS2 powder:
MoS2MoO3InsolublesFeSiO2H2OOilAcid Value
Molybdenum Disulfide Properties
Other NamesMolybdenum Disulfide, Molybdenum Sulfide, MoS2
CAS No.1317-33-5
Compound Formula MoS2 
Molecular Weight160.07 g/mol
Appearance black/lead-gray solid
Melting Point2,375 °C (4,307 °F; 2,648 K)
Boiling PointN/A
Density5.06 g/cm3
Solubility in H2O (water)insoluble
Electrical ResistivityN/A
Poisson's RatioN/A
Specific HeatN/A
Thermal ConductivityN/A
Thermal ExpansionN/A
Young's ModulusN/A
Exact Mass161.849549
Monoisotopic Mass161.849549
Molybdenum Disulfide Health & Safety Information
Safety WarningWarning
Hazard StatementsH315-H319-H335
Hazard CodesXi
Risk CodesN/A
Safety StatementsN/A
Transport InformationNONH for all modes of transport
WGK Germany3

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