Tungsten and tungsten electrode material of the electrode material manufacturing method

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PROBLEM TO BE SOLVED : To provide a tungsten electrode material which uses a material to replace thorium oxide so as to improve electrode service life as compared to the conventional technique. ŽSOLUTION : The tungsten electrode material has a tungsten base and oxide particles dispersed in the tungsten base. The oxide particles are prepared as an oxide solid solution containing in a solid solved state : Zr oxide and/or Hf oxide; and at least one rare-earth oxide chosen from Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu. ŽCOPYRIGHT : (C)2010, JPO&INPIT Ž