Structure of molybdenum disulfide


The excellent lubrication performance of molybdenum disulfide is determined by its crystal structure. Because the bonding force between sulfur atoms and molybdenum atoms in each molecular layer is powerful (covalent bond according to some literature), while the bonding force between sulfur atoms and molybdenum atoms between molecules is fragile (van der Waals force according to some literature), a plane with low shear force is generated. When the molecular layer is subjected to minimal shear force, breaking along the molecular layer and forming a slip plane is easy. For example, a molybdenum disulfide surface film with a thickness of 0.5 μm has 800 molecular layers and 799 slip planes. These numerous sliding surfaces transform the direct contact between the two metal surfaces with relative sliding into the sliding of the molybdenum disulfide molecular layer, thus reducing the friction factor and wear. Under some special preparation conditions, Molybdenum disulfide can react with the metal surface under extreme conditions to form a protective film. Molybdenum disulfide can be adsorbed on the surface of the metal (note that this is metal, plastic generally with PTFE), including a lubricating film, lubricating when the lubricating oil film breaks. Molybdenum disulfide adheres to the friction pair with the lubricating oil and creates a more robust connection (chemical affinity or physical embedding) than the lubricating oil. If you are looking for high quality, high purity and cost-effective molybdenum disulfide, or if you require the latest price of molybdenum disulfide, please feel free to email contact mis-asia.

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