Cerium Tungsten Electrodes and Problems of Application and Development Trends

Cerium Tungsten Electrodes Applications

Cerium tungsten electrode material in addition to the welding , plasma arc welding , displaced thorium tungsten electrode , the plasma cutting , plasma spraying , plasma melting the application effect is satisfactory . In addition, as the pump laser light source to cerium tungsten electrodes after replacing thoriated tungsten electrodes , so that the light source efficiency by about 12% , life expectancy increased by 5 to 10 times. In the electric light , for small and medium power xenon lamp has been used cerium tungsten electrodes , the electric vacuum , cerium tungsten material as the sealing member having a good use of effects .

Cerium Tungsten Electrodes Problems And Trends

Although cerium tungsten electrode material in a small tungsten electrodes for welding specifications had succeeded in replacing thoriated tungsten , but as AC welding electrodes and high-power xenon lamps and other aspects of the cathode gas discharge light source material , the use of cerium tungsten electrodes with thorium performance and life tungsten compared to the peaks and valleys are still unstable situation . Further, since the cerium has a high vapor pressure , and thus as the cathode material , there are still fast decay , poor stability . Thus in these areas are still using thorium tungsten electrode material .

With the progress and development of modern industry , welding, cutting the base material of the species, size and shape of the increasingly numerous , but in the field of welding is the rise since the resumption shou automatic welding , a series of new high- precision welding technology, the electrode materials and arc features a higher and more demanding requirements. Thorium tungsten , cerium tungsten electrode material , whether in arc starting , stable arc burning resistance or in terms of performance are unable to meet the growing requirements of welding technology . To this end , national science and technology workers are working on a new type of electron-emitting material . Studies have shown that adding tungsten matrix lanthanum or yttrium and other rare earth oxides , can greatly improve the ability of tungsten electron emission , especially lanthanum tungsten electrode material , from small to large current current range , all with excellent arc, arc stability and resistance to burning performance. Japan in the late 1980s has been able to mass production of rare earth tungsten electrode material , shortly thereafter , China has successfully developed . It is anticipated that this new type of electron emission materials will be involved in many industrial fields , use more widely, promising .


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