Complaint
Molybdenum disulfide is an important solid lubricant, known as the "king of advanced solid lubricants", especially suitable for high temperature and high pressure. It is also diamagnetic, can be used as a linear photoconductor and a semiconductor showing P-type or N-type conductivity, and has the functions of rectification and energy conversion. Molybdenum disulfide can also be used as a catalyst for the dehydrogenation of complex hydrocarbons.
Molybdenum disulfide is a solid powder made from natural molybdenum concentrate after chemical purification and then changing the molecular structure. The color of this product is black with silver gray Chemicalbook, metallic luster, slippery to the touch, and insoluble in water.
Advantages: The product has the advantages of good dispersibility and non-sticking. It can be added to various greases to form a non-sticky colloidal state, which can increase the lubricity and extreme pressure of the grease. It is also suitable for high-temperature, high-pressure, high-speed and high-load mechanical working conditions to extend the life of the equipment. The main function of molybdenum disulfide used in friction materials is to reduce friction at low temperatures, increase friction at high temperatures, and have a small loss on ignition. It is volatile in friction materials.
| 1,Molybdenum Disulfide basic information: |
English name: Molybdenum Disulfide |
CAS No.: 1317-33-5 |
Molecular formula: MoS2 |
Molar mass:160.06 |
Appearance: black/lead-gray solid |
Density(water=1): 4.8 |
Melting point(ºC): 1185 |
Solubility: decomposed by aqua regie, hot sulfuric acid, nitric acid, insoluble in dilute acid and water |
Hazardous characteristics: the powder in high temperature will burn and react violently with peroxide. |
2,Molybdenum Disulfide introduction: |
Molybdenum disulfide is the inorganic compound with the formula MoS2. This black crystalline sulfide of molybdenum occurs as the mineral molybdenite. It is the principal ore from which molybdenum metal is extracted. The natural amorphous form is known as the rarer mineral jordisite. MoS2 is less reactive than other transition metal chalcogenides, being unaffected by dilute acids. In its appearance and feel, molybdenum disulfide is similar to graphite. Indeed, like graphite, it is widely used as a solid lubricant because of its low friction properties, sometimes to relatively high temperatures. Molybdenum Disulfide (MoS2) is good solid lubricant available in three grades-Technical, Technical Fine, and Super Fine. |
3,Molybdenum Disulfide 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. |
4,Molybdenum Disulfide 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 |
C hlorine 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. |
5,Molybdenum Disulfide Applications: |
MoS2 is used as additives in lubricating grease, friction materials, plastic, rubber, nylon, PTFE, coating and so on. |
1) Widely used in automotive and mechanical industries,could be a very good solid lubricant materials. |
2) Lubricant for the drills bits,cutting tools and some non-oil and hard alloy steel; Lubricant additive and film remover of the nonferrous metals. |
3) Preparation of greases and additive of solid lubricant films, nylon filters and catalyst. |
4) Synthetic MoS2 is employed as a catalyst for desulfurization in petroleum refineries |
6,Molybdenum Disulfide Specifications: | ||||
Typical Analysis | Technical | Technical Fine | Super Fine | |
| Acid Insoluble | 0.50% | 0.50% | 0.50% | |
| Fe | 0.25% | 0.25% | 0.25% | |
| MoO3 | 0.15% | 0.15% | 0.20% | |
| H2O | 0.10% | 0.10% | 0.15% | |
| Oil | 0.20% | 0.40% | 0.40% | |
| Carbon | 1.50 | 1.50 | 1.50 | |
| Acid Number* | 0.05 | 0.25 | 3.0 | |
