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Lubricant (146)

Molybdenum disulfide

FOB Price: US $12 - 15 / Kilogram Get Latest Price
Min.Order Quantity: 510 Kilogram/Kilograms 17DRUMS
Supply Ability: 10 Ton/Tons per Month 100*50kg
Port: tianjin port
Payment Terms: T/T,Western Union
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Quick Details

Place of Origin:
Tianjin China (Mainland)
Brand Name:
okeyou
Application:
Industrial Lubricant
Type:
Compressor Oil
Specification:
SAE
General Composition:
Additives
Model Number:
okeyou
color:
lead gray powder
package:
50kg/drum
purity:
4%

Packaging & Delivery

Packaging Detail: 25kg or 50kg/drum(iron or fiber durm)
Delivery Detail: within 3days

Specifications

1,Summary: Lead gray powder,Dissolved in aqua regia,good chemical stability
2,Package:50kg/drum
3,D50um :<5um
4,MOQ:10kg

 Molybdenum disulfide is the main function of friction materials for low temperature anti-friction, high temperature by friction, loss on ignition of small, volatile materials in friction; friction.

Molybdenum disulfide is made of natural molybdenum concentrate powder after purification by chemical changes in molecular structure made of solid powder. This product is black Shaodai silver gray color, with metallic luster, a creamy touch of the flu, soluble in water. Products are well dispersed without the advantages of bonding, can be added in a variety of oils and fats, the formation of not Colloidal state bonding, to increase the oil's lubricating and extreme pressure. Also applies to high temperature, high pressure, high-speed high-load mechanical working condition, extend equipment life.

 

 Summary:High Pure Molybdenum Disulfide is in lead gray powder,dissolved in aqua regia,hot nitric acid and concentrated nitric acid,insoluble in water, dilute sulfuric acid and organic solvents. its chemical stability is good.

Application: producing Molybdenum compounds,solid lubricants and the additive of various kinds of lubricants.

Package:Iron drum. 50kg/drum. Inner packing is in two plastic bags,earch one is 25kg/bag.

Feature:

purity99.9%max
low oil0.05%min
moisture0.05%min
Friction factor 0.05-0.09

Production

Molybdenite ore is processed by flotation to give relatively pure MoS2, the main contaminant being carbon. MoS2 also arises by the thermal treatment of virtually all molybdenum compounds with hydrogen sulfide. Molybdenite is the principal ore from which molybdenum metal is extracted.

[edit] Structure and physical properties.

In MoS2, each Mo(IV) center is trigonal prismatic, being bound to six sulfide ligands, each of which is pyramidal. The trigonal prisms are interconnected to give a layered structure, wherein molybdenum atoms are sandwiched between layers of sulfur atoms. Because of the weak van der Waals interactions between the sheets of sulfide atoms, MoS2 has a low coefficient of friction, resulting in its lubricating properties. Other layered inorganic materials exhibit lubricating properties (collectively known as solid lubricants or dry lubricants) including graphite, which requires volatile additives, and hexagonal boron nitride.

MoS2 is diamagnetic and a semiconductor.

Chemical properties

Molybdenum disulfide is stable in air or oxygen at normal conditions, but reacts with oxygen upon heating forming molybdenum trioxide:

2 MoS2 + 9 O2 → 2 MoO3 + 4 SO3

Chlorine attacks molybdenum disulfide at elevated temperatures to form molybdenum pentachloride:

2 MoS2 + 7 Cl2 → 2 MoCl5 + 2 S2Cl2

Molybdenum disulfide reacts with alkyl lithium under controlled conditions to form intercalation compounds LixMoS2. With butyl lithium, the product is LiMoS2.

Use as lubricant

MoS2 with particle sizes in the range of 1-100 µm is a common dry lubricant. Few alternatives exist that can confer the high lubricity and stability up to 350 °C in oxidizing environments. Sliding friction tests of MoS2 using a pin on disc tester at low loads (0.1-2 N) give friction coefficient values of <0.1

Molybdenum disulfide is often a component of blends and composites where low friction is sought. A variety of oils and greases are used, because they retain their lubricity even in cases of almost complete oil loss, thus finding a use in critical applications such as aircraft engines. When added to plastics, MoS2 forms a composite with improved strength as well as reduced friction. Polymers that have been filled with MoS2 include nylon (with the trade name Nylatron), Teflon, and Vespel. Self-lubricating composite coatings for high-temperature applications have been developed consisting of molybdenum disulfide and titanium nitride by chemical vapor deposition.

Specific uses

MoS2 is often used in two-stroke engines; e.g., motorcycle engines. It is also used in CV and universal joints. During the Vietnam War, the molybdenum disulfide product "Dri-Slide" was used to lubricate weapons, although it was supplied from private sources, not the military. MoS2-coatings allow bullets easier passage through the rifle barrel causing less barrel fouling allowing the barrel to retain ballistic accuracy much longer.[8] This resistance to barrel fouling comes at a cost of slower muzzle velocity with the same load due to a decreased chamber pressure. MoS2 is applied to bearings in ultra-high vacuum applications up to 10−9 torr (at -226 to 399°C). The lubricant is applied by burnishing and the excess is wiped from the bearing surface.

Use in petrochemistry

Synthetic MoS2 is employed as a catalyst for desulfurization in petroleum refineries; e.g., hydrodesulfurization.[10] The effectiveness of the MoS2 catalysts is enhanced by doping with small amounts of cobalt or nickel and the intimate mixture is supported on alumina. Such catalysts are generated in situ by treating molybdate/cobalt or nickel-impregnated alumina with H2S or an equivalent reagent.

Future Developments

Lubrication

There are currently no clear lubrication alternatives to molybdenum disulfide or the very similar tungsten disulfide that can resist temperatures higher than 350°C in oxidizing environments. Research has been conducted on compacted oxide layer glazes, which form during metallic surface sliding wear at several hundred degrees Celsius. However, because these oxide layers are physically-unstable, their use has currently not proven practical.

Photocatalyst

When combined with cadmium sulfide, MoS2 increases the rate of photocatalytic hydrogen production.

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Tianjin Okeyou International Trade Co., Ltd. is an enterprise which engages in international trade in refined chemicals and organic chemical material. It can enjoy all favourable policies of Tianjin Port Free Trade Zone with the right for import and export business, and it has high economic strength.
Business scope of Tianjin Okeyou International Trade Co., Ltd. Includes petrochemicals, electromechanical devices, electronic products, measuring appliance, knitgoods, textile, paper product, ... View detail

Basic Information

Product/Service (We Sell): Aluminium Hydroxide,Molybdenum disulfide,potassium hydroxide,solvent,plasticizer  
Number of Employees: 11 - 50 People  

Trade & Market

Main Markets: Western Europe
Eastern Asia
Mid East
Africa
Southeast Asia
Export Percentage: 41% - 50%  

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China (Mainland) | Trading Company | Contact Details
Experience: Established 2006
Trade Assurance Amount: US $16,000

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Ms. Sara Lee
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