Patent ID: 8915226
Filing Date: 2014-12-23
Classification: H01T

Abstract:
1. An electrode material for an electrode of a spark plug, consisting essentially of: 0.3 to 3.0 mass % of Si, 0.01 to 0.3 mass % of one or more elements selected from the group consisting of Y and rare earth elements, Ti in an amount within a range of not less than 0.001 mass % and not more than 0.5 mass %, Fe in an amount within a range of more than 0.31 mass % and not more than 1.2 mass %, and at least one of Ca and Mg, the Ca being in an amount within a range of not less than 0.0001 mass % and not more than 0.20 mass % and the Mg being in an amount within a range of not less than 0.0001 mass % and not more than 0.08 mass %, and the electrode material further containing C, Mn, Cr, Al, N, and S, and in a total content of C, Mn, Cr, Al, N and S in a total electrode material composition, C being not more than 0.1 mass %, Mn being less than 0.5 mass %, Cr being less than 0.5 mass %, Al being not more than 0.3 mass %, N being not more than 0.05 mass %, and S being not more than 0.03 mass %, and the electrode material further containing Ni as a main part in a remainder and incidental impurities, a thermal conductivity of the electrode material is not less than 40 W/(m·K) at room temperature.