| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing an electrode material for a vacuum circuit breaker, whereby withstand voltage, breaking performance and capacitor switching performance can be improved, and the electrode material for a vacuum circuit breaker. <P>SOLUTION: The electrode material for a vacuum circuit breaker is produced by a method comprising a mixing step, a press-sintering step and a Cu infiltration step. In the mixing step, an Mo powder having a particle diameter of 0.8-6 μm is homogeneously mixed with a thermite Cr powder having a particle diameter of 40-300 μm in such a manner as giving a mixing ratio (Mo:Cr) of 1:1-9:1 and satisfying the weight relation: Mo≥Cr. In the press-sintering step, the resultant mixture is pressure-molded under a pressing pressure of 1-4 t/cm<SP POS="POST">2</SP>so as to give a molded article, and the molded article is subsequently sintered by maintaining the same at a temperature of 1,100-1,200°C for 1-2 h in a heating furnace so as to give a calcined article. In the Cu infiltration step, a thin Cu plate is placed on the calcined article and maintained at a temperature of 1,100-1,200°C for 1-2 h in a heating furnace so as to induce liquid-phase sintering of Cu and its infiltration into the calcined article. <P>COPYRIGHT: (C)2012,JPO&INPIT |
