The performance of tungsten electrode under vacuum conditions has the following characteristics:
Excellent High Temperature Resistance
Tungsten has an extremely high melting point (about 3410°C) and does not have oxidation problems in a vacuum environment, so it can withstand higher operating temperatures and keep the shape and performance of the electrode stable.
Good Arc Stability
The vacuum environment lacks gas molecules, which reduces the scattering and instability factors of the arc, which is conducive to the formation of a stable and concentrated arc and improves the welding or discharge efficiency.
Reduces Pollution and Oxidation
Under vacuum conditions, the surface of the tungsten electrode is not easily oxidized or contaminated, which extends the service life of the electrode and reduces arc instability or arcing difficulties caused by surface oxidation.
Changes In Heat Conduction and Heat Dissipation
Due to the lack of gas convection in the vacuum, the heat dissipation of tungsten electrodes mainly relies on their own thermal conductivity and radiation, which may lead to local overheating, and the current and electrode design need to be reasonably controlled.
It Is Widely Used In High Vacuum Equipment
For example, in the fields of vacuum coating, electron beam welding, and ion source, tungsten electrodes are widely used due to their high temperature resistance and good stability.
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