Method for reducing molybdenum oxidation in lamps
US5402038A · kind A · utility
10Cited by
5References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 4, 1992 |
| Grant date | Mar 28, 1995 |
| Priority date | — |
| Expiry date | May 4, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01K1/40
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Electric lamps having molybdenum metal parts exposed to an oxidizing environment can withstand exposure to higher operating temperature if the molybdenum metal parts are coated with silicon nitride (Si.sub.3 N.sub.4). Tungsten-halogen lamps having molybdenum outer leads coated with silicon nitride have operated for over 1500 hours at about 450.degree. C. without oxidation failure of the leads.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.