Hot surface igniters and methods of making same
US9951952B2 · kind B2 · utility
1Cited by
53References
40Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 15, 2014 |
| Grant date | Apr 24, 2018 |
| Priority date | — |
| Expiry date | Dec 26, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01C17/06533
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A method of making a hot surface igniter is described. A silicon carbide composition that includes both fines fraction and a coarse fraction is sintered in a nitrogen and argon reducing atmosphere in a manner that controls the incorporation of nitrogen with in the lattice of recrystallized silicon carbide. The controlled incorporation of nitrogen in the lattice provides enhanced control over heating and electrical properties, while simultaneously achieving a lower surface area fully recrystallized structure for oxidation resistance and long service life.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.