Method of making ruthenium-based material for spark plug electrode
US8890399B2 · kind B2 · utility
1Cited by
86References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 20, 2013 |
| Grant date | Nov 18, 2014 |
| Priority date | — |
| Expiry date | Jul 4, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01T21/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of making an electrode material for use in a spark plug and other ignition devices including industrial plugs, aviation igniters, glow plugs, or any other device that is used to ignite an air/fuel mixture in an engine. The electrode material is a ruthenium-based material that includes a “fibrous” grain structure. The disclosed method includes hot-forming a ruthenium-based material into an elongated wire that includes the “fibrous” grain structure while intermittently annealing the ruthenium-based material as needed. The intermittent annealing is performed at a temperature that maintains the “fibrous” grain structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.