Symbol : W
Other name : wolfrum
Atomic Number : 74
Atomic weight : 183.84
Melting point : 3695 K
Boiling point : 5828 K
Oxidation state : +6
Tungsten came into existence due to the works of Scheele, who found a new acid "tungstenic acid", later José and Fausto Elhuyar brothers successfully reduced it with the help of the charcoal and a new metal was invented. It was initially used in World War II for the weaponry industry. Occurring in steel gray to white metal color, it has a very high melting point after carbon. There 5 natural isotopes, with 30 artificial isotopes. Tungsten has the lowest vapor pressure, highest tensile strength and the lowest coefficient of thermal expansion of any pure metal. It is an essential nutrient for some organisms and the only metal known to occur in the biomolecules.
Tungsten has a wide range of uses, mainly in high temperature applications. These include light bulb, cathode-ray tube, vacuum tube filaments, and heating elements, nozzles on rocket engines, welding applications and in the gas tungsten arc welding process (also called TIG welding). Tungsten is also used in electrodes, in the emitter tips of field emission electron-beam instruments, such as focused ion beam (FIB) and electron microscopes, as an interconnect materials in ICs, manufacture of metallic films, X-ray targets, and shielding from high-energy radiations. Tungsten powder is used as a filler material in plastic composites, a nontoxic substitute for lead in bullets, shot, and radiation shields. Tungsten alloys play a major role due to their hardness and density. Superalloys like Hastelloy and Stellite, are used in turbine blades and wear resistant parts and coatings. High-density alloys of tungsten are used in darts or for fishing lures. Some types of strings for musical instruments are wound with tungsten wires. It also used in jewelry, glass to metal seals, a catalyst, high-temperature lubricants (WS2) and wear-resistant abrasives and cutters (WC). Tungsten oxides are used in ceramic glazes, calcium/magnesium tungstates are used widely in fluorescent lighting and inorganic pigments. Crystal tungstates are used as scintillation detectors in nuclear physics and nuclear medicine. Other salts that contain tungsten are used in the chemical and tanning industries.
Other name : wolfrum
Atomic Number : 74
Atomic weight : 183.84
Melting point : 3695 K
Boiling point : 5828 K
Oxidation state : +6
Tungsten came into existence due to the works of Scheele, who found a new acid "tungstenic acid", later José and Fausto Elhuyar brothers successfully reduced it with the help of the charcoal and a new metal was invented. It was initially used in World War II for the weaponry industry. Occurring in steel gray to white metal color, it has a very high melting point after carbon. There 5 natural isotopes, with 30 artificial isotopes. Tungsten has the lowest vapor pressure, highest tensile strength and the lowest coefficient of thermal expansion of any pure metal. It is an essential nutrient for some organisms and the only metal known to occur in the biomolecules.
Tungsten has a wide range of uses, mainly in high temperature applications. These include light bulb, cathode-ray tube, vacuum tube filaments, and heating elements, nozzles on rocket engines, welding applications and in the gas tungsten arc welding process (also called TIG welding). Tungsten is also used in electrodes, in the emitter tips of field emission electron-beam instruments, such as focused ion beam (FIB) and electron microscopes, as an interconnect materials in ICs, manufacture of metallic films, X-ray targets, and shielding from high-energy radiations. Tungsten powder is used as a filler material in plastic composites, a nontoxic substitute for lead in bullets, shot, and radiation shields. Tungsten alloys play a major role due to their hardness and density. Superalloys like Hastelloy and Stellite, are used in turbine blades and wear resistant parts and coatings. High-density alloys of tungsten are used in darts or for fishing lures. Some types of strings for musical instruments are wound with tungsten wires. It also used in jewelry, glass to metal seals, a catalyst, high-temperature lubricants (WS2) and wear-resistant abrasives and cutters (WC). Tungsten oxides are used in ceramic glazes, calcium/magnesium tungstates are used widely in fluorescent lighting and inorganic pigments. Crystal tungstates are used as scintillation detectors in nuclear physics and nuclear medicine. Other salts that contain tungsten are used in the chemical and tanning industries.
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