Patent ID: 8274204

Claim:
A spark plug, comprising: a metallic shell having an axial bore; an insulator having an axial bore and being at least partially disposed within the axial bore of the metallic shell; a center electrode being at least partially disposed within the axial bore of the insulator; and a ground electrode being attached to a free end of the metallic shell; wherein the center electrode, the ground electrode, or both includes an electrode material having about 50 to 99 atomic %, inclusive, of platinum (Pt), having about 5 to 10 atomic %, inclusive, of aluminum (Al), and having no more than about 30 atomic % of a refractory metal selected from the group consisting of: nickel (Ni), rhenium (Re), ruthenium (Ru), tantalum (Ta), tungsten (W), molybdenum (Mo), or a combination thereof, wherein the electrode material limits locally excessive oxidation and re-deposition of platinum (Pt) at a surface of the electrode material.