Tungsten Filament For Electron Source Filament

 High temperature performance

The working temperature of tungsten filament for incandescent lamps is usually between 2300-2800 ℃. Generally, the higher the power of the bulb, the higher the working temperature of the filament. It can be seen that the working temperature of the filament far exceeds the re-crystallization temperature of the tungsten filament.

 Room temperature performance

The room temperature performance of tungsten wire is reflected in the winding performance. Due to its long processing flow, tungsten wire is easy to produce many small cracks or become brittle locally if the process management is not good, so that it is easy to break when winding. The fracture of the wire wound caused by the crack is in the shape of whiskers, and the fracture caused by the brittleness of the wire is in the shape of crystal plane.

Consistency of wire diameter

The poor consistency of tungsten filament diameter is an important reason for the out-of-tolerance photoelectric parameters of incandescent bulbs, and some of them will also affect the service life of the bulb.

Products Description

 

The resistivity of tungsten wire is 5.3*10^-8. In addition to a small amount of tungsten wire used as heating materials for high temperature furnace, electron tube thermions and composite reinforcement, most of the filament is used to make a variety of incandescent lamp and halogen tungsten lamp filament and gas discharge lamp electrode. Mainly used in the production of coil filament incandescent lamp, power tube cathode and support structure, high temperature furnace heating element and evaporation source for metallization. Coarse tungsten wire, straightened after surface treatment, and cut into a number of rods, widely used in lighting and electronic industry glass metal sealing components.

 

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