The doped tungsten wire is the wire that dopes certain amount of potassium and silicon into pure tungsten powder. It will not only increase the color temperature, luminous efficiency and life time of wire, but also has well anti sag propery, it can be used as special lamp filament with high working temperature such as halogen lamp. Provided that some alloy elements such as cobalt are added into the doped wire, the wire will have high strength and shock resistance. The wire is generally used in lighting system in vibration environment, lamps for various vehicles (motorcycles, automobiles, trains, airplanes, etc) as well as special light bulbs for military purposes, heating wires for aeroengine, etc.

Tungsten and its alloys are the major materials applied in fusion reactors owing to their high melting point, high thermal conductivity, high strength at elevated temperatures, low sputtering yield in radiation environment.

Tungsten is used in the production of numerous end use items. It is widely used for high temperature applications such as filaments in light bulbs, cathodes in high power lamps, and rocket nozzles in space crafts. Tungsten is also used in the manufacture of superalloys and catalysts. In addition, its considerable applications in industry as a refractory metal owing to its outstanding hardness and wear resistance in the form of tungsten carbide are well known.

Ammonium metatungstate (AMT, (NH4)6H2W12O40·yH2O) is a polycondensation product of solutions of ammonium tungstate. The applications of it include high distectic point metal, extra fine alloy, petrochemical catalyzer and nuclear energy, space flight, casting titanium, etc.