Application of Tungsten Wire

Tungsten wires as a material of electric light source play an important role in the lighting industry. The major application of tungsten wire in electric light source is lighting. Besides, the tungsten wires as light emitting body in bulbs need to add potassium oxide, silicon oxide and aluminum oxides during production processes, so tungsten wire also is known as doped tungsten wire or Not-sag tungsten wire. With the development of economy and production technology of tungsten wire, tungsten wire can be applied to ordinary light bulbs, but also can be applied to a variety of high-performance bulbs. For example, doped a certain amount of K, Al, Si and other elements into tungsten powder to produce doped tungsten wire can not only improve the color temperature of filament, the light-emitting efficiency and service life, but also the tungsten wire has good high temperature anti-sag properties therefore it can be used as a halogen lamp and other special high-temperature filament. On the other hand, added some alloy elements such as Co into doped tungsten powder can be made of high-strength shock tungsten wire for vibration environment lighting application, such as motorcycles, cars, trains, airplanes’ lighting and so on. Besides, it also can apply to military use special light bulbs and heating wire of aerospace engine heating wire.

Tungsten wires not only are widely used in the field of electric light sources also developed in other areas. Added some alloy elements into tungsten powder or doped tungsten powder such as thorium, rhenium, cerium, yttrium, lanthanum or zirconium and other elements can be made of tungsten alloy wire. Tungsten alloy wire can be used as arc welding electrodes, thermocouple, CRT cathode filament, and filament electron emission tubes, and be used in various fields.

In addition, a small amount of tungsten wire is also used as a high-temperature furnace heating material, the heater of electronic valve and strengthening rib of composites.

Tungsten wires at room temperature have good acid and alkali capacity, but are easily oxidized in moist air, so it can not be placed and stored in a humid environment for long time.