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Introduction to Molybdenum Disulfide Pulver
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. It has a melting temperature of 2375, a density 4.80g/cm3 (14), Mohs hardness 1.0 1.5.
Molybdenum disulfide decomposes at 1370, and then to molybdenum metallic and sulfur at 1600. Molybdenum sulfuric acid begins to oxidize when it is heated in air at 315. Molybdenum sulfide can’t be dissolved in water, dilute or concentrated sulfuric acids. Slow oxidation takes place at 400. Then, molybdenum dioxide is formed.
Can be heated to produce molybdenum pythloride by reacting with chlorine gas
Molybdenum disulfide reacts to alkyl-litium 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 and 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 is non-magnetic and has semiconductor properties. Molybdenum dioxide mo-S edges are quite numerous, easy to peel among layers, with good anisotropy. They have strong adhesion and can adhere to any metal surface. Molybdenum dioxide is a lubricant that has high compressive strength, wear resistance, excellent adhesion (0.03-10.08), and film structure characteristics. It can also be used under high pressure. Molybdenum dioxide begins to oxidize at 400 to molybdenum trichloride and quickly oxidizes above 540 to molybdenum trichloride. It was sublimated to 450 in an atmosphere of inertia, decomposed to molybdenum at 1370 and decomposed to sulfur at 1600. 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, Ca, and other impurities from 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 process is low. If the temperature drops below 400 degrees it is recommended that you use a low-cost MoS2 for normal conditions. 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 combined with sulfur to create the precursor body. Once the precursor is reduced or decomposed, the MoS2 can be obtained by using appropriate methods.
Molybdenum Disulfide Powder – Applications
Lubricants for dry films
. 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. At the moment, dry film lubricant can be used to lubricate bearings, gears, and other civil products.
. Molybdenum sulfide ointment generally is added to oil and fat with a mole fraction of about 4.4%. 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, rail, or gear
. The film-forming powder is widely used for lubrication of the gears on locomotive drive shafts, cranes or steel rolling equipment. It can also be used to grease large machinery such as mines. You can extend the life of rail by applying film-forming paste to rail and rim. Rim life is extended 7 times, and electricity or fuel is saved approximately 7%.
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