Tungsten Electrode Application

Tungsten electrode including pure tungsten electrodes, rare earth tungsten electrode and composite tungsten electrode, the most widely used electrode is rare earth tungsten electrodes. Rare earth tungsten electrodes main include: thoriated tungsten electrode, ceriated tungsten electrode, lanthanated tungsten electrode, zirconiated tungsten electrode and so on. Tungsten electrode material having good arc performance, low electrode burning loss, long life and other good properties often used in welding, electric light and electric ionizer and other related fields. It has wildely application. Tungsten electrodes are a critical material in welding, plasma welding and cutting. Commonly, thoriated tungsten electrode usually used in welding. Thoriated tungsten electrode having low electron work function, can work well even under overload voltage. In addition, the electrode arc starting is stability when welding does not contaminate the welded parts. Besides, it has long service life. However, because thoriated tungsten electrode has radioactive contamination, therefore, at present, people often use ceriated tungsten electrodes in place of thoriated tungsten electrode used in welding field.

Tungsten electrode material having a low work function, high melting point and low growth pressure property, these features help to reduce load temperature, reducing electrode burning and sputter etching, thereby extending lamp life. Some researchers use the liquid-solid mixing method to produce rare earth tungsten electrodes, by processing making low-power metal halide lamp electrodes, and assembling into a 70W metal halide lamp whole. After analysis the property of different metal halide materials found that metal halide which made by dysprosium tungsten and dysprosium yttrium tungsten electrode has best splash performance and corrosion resistance.

Tungsten electrode is often used as a cathode in plasma generator. This electric ionizer commonly used in cutting, thermal spraying, welding, melting, new materials synthesis, ultrafine powder production and other high-energy ion bombardment environment, so that the cathode material should have good high temperature performance and wear resistance, in order to improve service life of the electric ionizer. Rare earth tungsten electrodes have the above excellent performance, it is considered to be the best material an in electric ionizer.

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