By Cathy | 22 April 2024 | 0 Comments
Why is molybdenum disulfide a lubricant?
A lubricant is a substance, such as lubricating oil and grease, that is used between two objects in relative motion and has the ability to reduce friction and wear caused by contact. According to the different physical state, it can be divided into many kinds, there are solid type, liquid type, gas type, and semi-solid type four categories. Typical solid lubricants include molybdenum disulfide (MoS2) powder, tungsten disulphide (WS2) powder, and so on.
Molybdenum disulphide is a solid powder made from purified natural molybdenum concentrate powder, which is the modern "king of advanced solid lubrication". MoS2 powder has the advantages of radiation resistance, high temperature resistance, high vacuum resistance, corrosion resistance, extreme pressure resistance, etc. therefore, it has been widely used as an additive in grease, modified plastics, powder metallurgy, spraying and other industries at home and abroad.
Why Molybdenum Disulfide is A Lubricant?
The main reason why molybdenum disulphide powder can be used as a solid lubricant is that MoS2 has a layered structure, the sulfur atoms between the layers are weakly bonded (van der Waals force), easy to slide, and then show good friction reduction; the sulfur atoms exposed on the crystal surface produce a very strong adhesion to the metal surface to form a very solid film, which contributes to the lubrication performance is better than that of graphite.
In addition, MoS2 powder also has the advantages of better heat resistance and oxidation resistance, and thus is more suitable than graphite to work in a vacuum such as space. However, when using MoS2 as a lubricant, we should pay attention to the purity and particle size of the powder. Generally speaking, the lubrication performance of MoS2 powder with high purity and small particle size is chosen to be better.
Molybdenum Disulfide Advantages
Molybdenum disulfide is used in almost all markets where grease is used and in almost all types of grease thickeners, including lithium complexes, aluminium complexes and polyureas. It is also considered to be the optimal additive for titanium complex greases, where even better performance can be achieved with its inherent high load-carrying capacity.
Typically, greases contain 1 to 2 percentage MoS2 and the key parameters are surface roughness, load-carrying and speed. Regarding to rougher metal surfaces, larger MoS2 particle sizes are ideal, as the larger particles fill in the deep valleys and help to form a smooth surface. For a given MoS2 concentration, small and medium particles will provide better load-bearing capacity. At the same time, very small particles may create some corrosion problems due to higher acid values. In general, a medium particle size of about 6um is the most commonly used MoS2 particle size in greases.
Molybdenum disulfide is now an indispensable and irreplaceable industrial additive. It has made a great contribution to the development of new modern technologies, not only bringing lubrication technology to a whole new stage, but also creating favourable conditions for the development of pure dry film lubrication.
High-quality MoS2 Powder Supplier
TRUNNANO is a trusted global chemical materials supplier and manufacturer with over 12 years of experience in ultra-high quality molybdenum disulfide and other chemicals. The company develops a variety of powder materials and chemicals. Provide OEM services. If you are looking for MoS2 powder, please contact us.
Why Molybdenum Disulfide is A Lubricant?
The main reason why molybdenum disulphide powder can be used as a solid lubricant is that MoS2 has a layered structure, the sulfur atoms between the layers are weakly bonded (van der Waals force), easy to slide, and then show good friction reduction; the sulfur atoms exposed on the crystal surface produce a very strong adhesion to the metal surface to form a very solid film, which contributes to the lubrication performance is better than that of graphite.
Molybdenum Disulfide Advantages
Molybdenum disulfide is used in almost all markets where grease is used and in almost all types of grease thickeners, including lithium complexes, aluminium complexes and polyureas. It is also considered to be the optimal additive for titanium complex greases, where even better performance can be achieved with its inherent high load-carrying capacity.
Typically, greases contain 1 to 2 percentage MoS2 and the key parameters are surface roughness, load-carrying and speed. Regarding to rougher metal surfaces, larger MoS2 particle sizes are ideal, as the larger particles fill in the deep valleys and help to form a smooth surface. For a given MoS2 concentration, small and medium particles will provide better load-bearing capacity. At the same time, very small particles may create some corrosion problems due to higher acid values. In general, a medium particle size of about 6um is the most commonly used MoS2 particle size in greases.
High-quality MoS2 Powder Supplier
TRUNNANO is a trusted global chemical materials supplier and manufacturer with over 12 years of experience in ultra-high quality molybdenum disulfide and other chemicals. The company develops a variety of powder materials and chemicals. Provide OEM services. If you are looking for MoS2 powder, please contact us.
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