Overview of Tungsten Disulfide
One of the most distinctive features of tungsten disulfide (WS2) is its performance as a lubricant, even under harsh conditions (e.g. high temperature and high pressure). Its coefficient of friction (CoF) of 0.03 is nearly unmatched.
Depending on the techniques used in its preparation, exfoliated 2D WS2 layers have three crystal phases: octahedral (1T) and hexagonal (2H and 3R). Such phases provide opportunities for structure engineering at an atomic level to develop new optoelectronic properties. It is known that the 2H (antiparallel) and 3R (parallel) hexagonal phases are semiconducting.
Of the two hexagonal phases, 2H is the more stable form. The octahedrally-coordinated 1T phase is not stable in a bulk form, and is associated solely with single-layer films. It is believed that the 1T phase is metallic and can be transformed from 2H WS2 by electron doping (e.g. by electron irradiation or lithium ion intercalation).
Tungsten disulfide (WS2) is an inorganic compound of tungsten and sulfur and is part of the metal dichalcogenides material group. WS2 occurs naturally as tungstenite but can also be created synthetically. WS2 has a layered structure with tungsten atoms appearing in a trigonal prismatic coordination sphere.
Applications of Tungsten Disulfide
1. The friction coefficient of tungsten disulfide is extremely low (0.03), extremely high resistance to extreme pressure and oxidation resistance (starts to decompose in the air at 450°C, completely decomposes at 650°C, and at 1100°C Start to decompose under temperature). The vacuum decomposes and completely decomposes at 2000°C). It is suitable for lubrication under various harsh conditions, such as high temperature, high pressure, high vacuum, high load, high metering, high radiation, strong corrosion and ultra-low temperature.
2. Tungsten disulfide has good adsorption capacity on the metal surface. It can be added to engineering plastics to squeeze lubricating parts, or evenly mixed with some soluble solvents, and then sprayed on the metal surface to improve the life of the mold and the surface finish of the workpiece during the forging process.
3. Tungsten disulfide powder can be mixed with grease to form tungsten disulfide oil, tungsten disulfide ointment, tungsten disulfide wax and other solid lubricating blocks and lubricating films.
4. You can use tungsten disulfide as a lubricant, which has better performance than molybdenum disulfide, lower friction coefficient and higher compressive strength. Respectively used for high temperature, high pressure, high speed, high load and equipment operating in chemically active media. The use of forging and stamping lubricants constructed of other materials can extend the life of the mold and improve the finish of the product. Filling materials composed of polytetrafluoroethylene and nylon can be used to make self-lubricating parts.
5. In addition, tungsten disulfide can also be used as a catalyst in the petrochemical industry. Its advantages are high cracking performance, stable and reliable catalytic activity, and long service life.
Tungsten Disulfide Price
Tungsten disulfide price will vary randomly with the production cost, transportation cost, international situation, exchange rate, and market supply and demand of Tungsten disulfide. Tanki New Materials Co.,Ltd Aims to help All industries and Chemical Wholesalers to find high quality, cheap price Nanomaterials and chemicals by providing turn-key customize manufacturing services. If you are looking for Tungsten disulfide, please feel free to send an inquiry for the latest price of Tungsten disulfide.
Tungsten Disulfide Supplier
As a global Tungsten disulfide supplier, Tanki New Materials Co.Ltd has rich experiences in the properties, applications, and cost-effective manufacturing of advanced and engineered materials. The company has successfully developed a series of powder materials (including oxides, carbides, nitrides, single metal, etc.), high-purity targets, functional ceramics, and structural devices, OEM service is available.
More information about Tungsten Disulfide
Tungsten Disulfide General Information | |
CAS number | 12138-09-9 |
Chemical formula | WS2 |
Molecular weight | 247.97 g/mol |
Bandgap | 1.4 - 2.01 eV [1] |
Synonyms | Tungsten sulphide, Tungsten sulfide, Tungsten (IV) sulfide |
Classification / Family | Transition metal dichalcogenides (TMDCs), 2D Semiconductor Materials, NIR band-gap, Nano-electronics, Nano-photonics, Transistors, Photovoltaics, Materials science |
Tungsten Disulfide Properties | |
Chemical formula | WS2 |
Molar mass | 247.98 g/mol |
Appearance | blue-gray powder |
Density | 7.5 g/cm3, solid |
Melting point | 1,250 °C (2,280 °F; 1,520 K) decomposes |
Solubility in water | slightly soluble |
Band gap | ~1.35 eV (optical, indirect, bulk) |
Magnetic susceptibility (χ) | +5850·10−6 cm3/mol |
Tungsten Disulfide Structure | |
Crystal structure | Molybdenite |
Coordination geometry | Trigonal prismatic (WIV) |
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