High intensity vapor discharge lamp with sintering aids for electrode emission materials
US4152620A · kind A · utility
8Cited by
5References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 29, 1978 |
| Grant date | May 1, 1979 |
| Priority date | — |
| Expiry date | Jun 29, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/0737
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Sintering aids are disclosed which inprove the sintering of emission materials in high pressure discharge lamps. The sintering aid is a eutectic composition of at least one of barium oxide-tungsten oxide (BaO--WO.sub.3), calcium oxide-tungsten oxide (CaO--WO.sub.3), or strontium oxide-tungsten oxide (SrO--WO.sub.4)and is mixed with the emission material in quantities of about 2 to 50 wt.% sintering aid and 50 to 98% emission material. Preferably, the sintering aid is present at between about 5 and 10 wt.%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.