Properties and Uses of Molybdenum Disulfide

What is molybdenum disulfide?
Molybdenum disulfide is an inorganic substance with the chemical formula MoS2, which is the main component of molybdenite. Black solid powder with metallic luster. The melting point is 2375°C, the density is 4.80g/cm³ (14°C), and the Mohs hardness is 1.0~1.5. Molybdenum disulfide has a high content of active sulfur, which is easy to cause corrosion to copper. It is discussed in many books and papers on lubricant additives. In addition, when the parts made of copper and its alloys need to be lubricated, it is not impossible to use molybdenum disulfide lubricating products, but also to add copper corrosion inhibitors.
Uses of molybdenum disulfide

Molybdenum disulfide is an important solid lubricant, especially suitable for high temperature and high pressure. It is also diamagnetic, can be used as a linear photoconductor and a semiconductor showing P-type or N-type conductivity, and has the functions of rectification and energy conversion. Molybdenum disulfide can also be used as a catalyst for the dehydrogenation of complex hydrocarbons.
It is also known as the "king of advanced solid lubricants." Molybdenum disulfide is a solid powder made from natural molybdenum concentrate powder after chemical purification and changing the molecular structure. The color of this product is black with silvery gray, metallic luster, slippery to the touch, and insoluble in water. The product has the advantages of good dispersibility and non-sticking. It can be added to various greases to form a non-sticky colloidal state, which can increase the lubricity and extreme pressure of the grease. It is also suitable for high-temperature, high-pressure, high-speed and high-load mechanical working conditions to extend the life of the equipment.
The main function of molybdenum disulfide used in friction materials is to reduce friction at low temperatures, increase friction at high temperatures, and have a small loss on ignition. It is volatile in friction materials.
Anti-friction: Molybdenum disulfide processed by supersonic jet pulverization has a particle size of 325-2500 mesh, micro-particle hardness of 1-1.5, and friction coefficient of 0.05-0.1, so it can reduce friction when used in friction materials;
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 does not have an energy band gap. Therefore, molybdenum disulfide may have a broad application space in the field of nano-transistors.
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