Method for manufacturing electrode material and electrode material

A method for producing an electrode material, comprising:

• a provisional sintering step of sintering a mixed powder containing a powder of a heat resistant element having at least one kind selected from elements including Mo, W, Ta, Nb, V, and Zr and a powder of Cr to obtain a solid solution where the heat resistant element and Cr are dissolved, the powder of the heat resistant element having a content of 6 to 76 wt % relative to the electrode material and the powder of Cr having a content of 1.5 to 64 wt % relative to the electrode material, the powder of the heat resistant element and the powder of Cr being mixed such that a weight ratio of Cr to the heat resistant element is four or less to one;
• a pulverizing step of pulverizing the solid solution to obtain a powder of the solid solution;
• a hot isostatic pressing treatment step of subjecting a molded body formed by molding the powder of the solid solution or a sintered body of the molded body to a hot isostatic pressing treatment;
• and
• an infiltration step of infiltrating Cu and/or Ag into an objective body obtained by the hot isostatic pressing treatment after the hot isostatic pressing treatment, Cu and/or Ag having a content of 20 to 70 wt % relative to the electrode material.