| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrode for a vacuum valve, which has breaking performance, withstand voltage, and fusion resistance that undifferentiate the electrode from prior art electrodes, even if refinement method, by which refractory metal for the constituent of an arc electrode is refined, is changed, and an amount of a trace element included in the arc electrode is changed. SOLUTION: The electrode for the vacuum valve comprises a fixed side electrode 17, a moving side electrode 16, an electrode support 9 supporting either of the fixed side electrode 17 and the moving side electrode 16, and an electrode rod 10 supporting the electrode support 9 from the back, where the entire surfaces of the fixed side electrode 17 and the moving side electrode 16 opposed each other are formed by an arc electrode 7 made of an alloy of a refractory metal and a high conductive metal, the electrode support 9 is made of a high conductive metal, the electrode rod 10 is made of a high conductive metal, and the refractory metal includes trace elements of Al 30 to 3000 ppm, Si 20 to 2500 ppm, and Fe 1300 to 300 ppm.
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