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Introduction to Molybdenum Disulfide Pulver
It is a type of inorganic. MoS2, which is molybdenite’s main component, has the chemical formula MoS2. It is a solid black powder with a metallic luster. The melting point is 2375, the density is 4.80g/cm3(14), and Mohs Hardness is 1.0 1.5.
Molybdenum disulfide decomposes at 1370, and then to molybdenum metallic and sulfur at 1600. Molybdenum oxide begins to oxidize when it is heated in air at 315. Molybdenum sulfide can’t be dissolved in water, dilute or concentrated sulfuric acids. At 400, slow oxidation takes place and molybdenum dioxide forms.
Can be heated to produce molybdenum pythloride from chlorine gas.
Molybdenum disulfide reacts to alkyl-lipid under control to create an embedded compound (intercalated compounds) LixMoS2. If it reacts to butyllithium, then the product is LiMoS2.
Copper has a high level of active sulfur. It is easy to cause copper to corrosion. This topic has been covered in many papers and books on lubricant ingredients. Additionally, when parts of copper or their alloy manufacturing require lubrication it is not necessary that lubrication products contain molybdenum disulfide. Instead, they must be combined with an anti-copper agent.
Molybdenum Disulfide Pulp Powder’s Physical Chemistry
It is insoluble with water and dilute acids. It can be corroded easily by concentrated sulfuric, concentrated nitric, boiling concentrated chloric acid, aqua regia or pure oxygen, fluorine, or chlorine. It is insoluble with other bases, solvents and petroleum. It has good chemical stability and thermal stability. It does not react to general metal surfaces. Molybdenum dioxide mo-S edges are quite numerous, easy to peel among layers, and have good anisotropy. They have strong adhesion to metal and can adhere to any metal surface. The lubricant molybdenum dioxide is high in compressive strength, wear resistance, excellent adhesion (0.03-10.08), film structures characteristics, and stable under high pressure. It can also be used under high temperatures (1200), low temperatures (-190), high speeds, high pressure, ultralow temperature, high vacuum, and high temperatures. Molybdenum dioxide begins to oxidize at 400 to molybdenum oxide, and quickly oxidizes above 540 to molybdenum triooxide. It was sublimated to 450 in an atmosphere of inertia, and at 1370 it was decomposed to molybdenum trioxide and sulfur. By controlled reaction of alkyl lithium and molybdenum dioxide, it was formed into molybdenum penichloride. Low toxicity.
|Molybdenum Disulfide Powder Properties|
|Other Names||Molybdenum Disulfide (Molybdenum Sulfide), MoS2|
|Appearance||solid in black/leadgray|
|Melting Point||2,375 degC (4,307 degF; 2,648 K)|
|Solubility of H2O||Insoluble|
Molybdenum Disulfide Pulver Preparation Methods
Molybdenum dioxide has many applications and great properties. Therefore, nano-mos2 preparation and application have been extensively studied both at home and abroad.
MoS2 can be prepared using the natural molybdenite concentration purification method. This method removes acid insoluble matter, SiO2, Fe Cu, Ca, Cu, Pb, and other impurities in molybdenite concentration after a certain physical and chemical activity. Next, refine the process to create nano-mos2. This is how the Us Climax Molybdenum firm produces MoS2. This method is suitable for the production of lubricants because it preserves the MoS2 crystal form. However, the purity and purification of nano MoS2 made by the natural method is low. If the temperature drops below 400 degrees it is best to use a low-cost MoS2 for ordinary environments. It is not possible to lubricate the MoS2 with a lower lubrication level than 1300.
The synthesis process can produce sulfide in high purity, with few impurities and fine particles, and can meet different functional requirements. This is why the synthesis procedure to make nano sulfide was so important. There are many ways to make nano-MOS2, including the thermal decomposition technique of ammonium triathiomolybdate and hydrogen sulfide reduction methods, high-energy ball grinding method, carbon nanotubes space-limiting method, hydrothermal synthesizing method, and high-energy physical or chemical means. Two preparation methods can be used to make nano-mos2: The tungsten source/molybdenum can be directly mixed with the source of sulfur, or the tungsten and molybdenum can be mixed with the source of sulfur to create the precursor body. Once the precursor is reduced or decomposed, the body can be reduced to MoS2 with appropriate methods.
Molybdenum Disulfide Powder – Applications
. Molybdenum disulfide can be used as a lubricant in nearly all dry film lubricants. Molybdenum-disulfide dry-film lubricants that are most commonly used are the United States military dry films MIL L-3987, and MIL L-23398. Dry film lubricant can be used to lubricate bearings, gears, and other civil products.
. Molybdenum sulfide ointment generally is added in oil and fat with an average mass fraction of about 4.4% molybdenum sulfide. It has been used successfully in the fields of metallurgy and steel rolling, as well as mining machinery and equipment for coal mining. Some high-temperature, open air, field, and tunnel application equipment makes it difficult to grease or supplement equipment.
Lubricating film-forming glue for wheels, rails and gear
. The film-forming powder is widely used for lubricating the gear of locomotive drive shafts. You can extend the life of rail by applying film-forming paste to rail and rim. Rim life can be increased 7 times, and electricity (or fuel), is reduced by around 7%.
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