【摘要】 采用热压烧结法制备出 Ｗ－纳米 ＴｈＯ２新型阴极材料，研究了材料的电学性能该阴极材 料的临界起弧电压比传统材料降低 ２０％；引弧较为容易和平稳，其电弧静特性曲线下降，电子发射能力增 强。更多还原

【Abstract】 A novel cathode, fine grain tungsten activated with nano-ThO2, was ’fabricated by Hot-Press sintering. In comparison to the conventional W-ThO2 electrode, the characteristics for TIG was investigated. The results show that for this cathode the striking voltage has decreased by 20% and the arc starts easy and stably. In addition, the static characteristics of arc decline and the ability of electron emission is enhanced.更多还原