Tungsten Disulfide (WS2)-Powder

Characteristic




Tungsten disulfide is an inorganic chemical compound composed of tungsten and sulfur with the chemical formula WS2. This compound is part of the group of materials called the transition metal dichalcogenides.




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)

                    ~2.05 eV (optical, direct, monolayer)

Magnetic susceptibility (χ)：+5850·10−6 cm3/mol

Crystal structure：Molybdenite




Application




WS2 is used, in conjunction with other materials, as catalyst for hydrotreating of crude oil.




Lamellar tungsten disulfide is used as a dry lubricant for fasteners, bearings, and molds under the brand name Dicronite.