With the development of science and technology and the improvement of human environmental protection awareness, many new electrode materials have been studied in recent years to replace thoriated tungsten electrodes. In the 1960s, the Soviet Union started the development of new materials. China in 1973, developed a W-CeO2 electrode material. In the late 1980s, Japan launched a series of unit rare earth electrodes, including W-Y2O3, W-CeO2 and W-La2O3 and so on. The composite rare earth electrode is introduced in the 90s, by adding a variety of rare earth oxide composite electrode has excellent welding performance.
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