Patent ID: 11870222
Assignee: FEDERAL-MOGUL IGNITION GMBH
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B | IPC H

Claim 5:
6. The spark plug electrode of claim 1, wherein the precious metal-based material is selected from the group consisting of: an iridium-based material with a coefficient of thermal expansion that is between 6×10−6 m/mK and 7×10−6 m/mK and a melting temperature that is between 2,400° C. and 2,500° C. or a platinum-based material with a coefficient of thermal expansion that is between 8×10−6 m/mK and 10×10−6 m/mK and a melting temperature that is between 1,700° C. and 1,800° C.