Tungsten Disulfide Powder: The Main Features
Tungsten dioxide is a compound made of tungsten, sulfur and has a chemical formula WS2 as well as a molecular mass of 247.97. It is a black-gray, powder. It looks like tungstenite in the natural world and is a dark gray crystalline solid. The relative density is 7.10. The relative density is 7.510. It is insoluble in hydrochloric acids and alkali, except for the mixture of hydrofluoric acid with concentrated nitric. Soluble in molten alkali, insoluble in alcohol. Density 7.6g*cm-3. It has a reducibility, which allows it to react with hot concentrated sulfic acid, nitric and other strong oxygenants. [1] It decomposes to tungsten and other sulfur when heated to 1250 under vacuum. To eliminate excess sulfur, the mixture is co-heated to 900°C in a dry stream.
Tungsten Sulfide Properties | |
Other Titles |
tungsten sulfide (WS2), tungsten disulphide,
tungsten(IV) sulfide, WS2 powder |
No. | 12138-09-9 |
Combination Formula | WS2 |
Molecular Weight | 247.97 |
Appearance | Gray to Black Powder |
Melting Point | 1250 degC |
Boiling Point | N/A |
Density | 7.5 g/cm3 |
Solubility of H2O | N/A |
Exact | 247.895074 |
Useful as a lubricant. Higher performance than molybdenum sulfide, lower friction coefficient, and higher compressive strengths. It is best used in conjunction with other lubricants for high temperatures, high pressure, high speeds, high loads, and equipment that runs in chemically active media. Combining other materials with forging and stamping oils can extend the life of the die, and increase the quality of the finished product. Filler material formulated with polytetrafluoroethylene and nylon for self-lubricating parts.
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