SPARK PLUG ELECTRODE MATERIAL HAVING EXCELLENT SPARK CONSUMPTION RESISTANCE AND EXCELLENT DISCHARGE CHARACTERISTICS

摘要

Provided is a plug electrode material which has excellent oxidation consumption resistance and excellent spark consumption properties and is produced taking discharge characteristics in using into consideration. The plug electrode material comprises 5-30 mass% inclusive of Cu, 0.1-15 mass% inclusive of Ir and Pt as the balance. By compositely alloying two metals, i.e., Cu and Ir, the discharge voltage can be lowered and the spark consumption resistance can be improved. By adding only one of these metals, an insufficient effect of improving the spark consumption resistance is merely obtained and no lowering in discharge voltage can be expected.