Multiple layer composite electrodes for discharge lamps
US5847498A · kind A · utility
6Cited by
7References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1994 |
| Grant date | Dec 8, 1998 |
| Priority date | — |
| Expiry date | Dec 23, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/067
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Composite sintered electrodes with improved properties that make them suitable for use in a variety of lamp types, are provided which comprise a refractory metal and a substantial amount of a refractory emitter oxide, either single layer or multiple layer, the composites having been subjected to sintering at an elevated temperature effective to form a composite electrode having a density of at least 85%, preferably in the presence of a sintering activator, such as for example, Ni, or mixture thereof with a sintering aid such as, for example, Li.sub.2 O.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.