HID Lamp emission material
US4210840A · kind A · utility
8Cited by
8References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 12, 1978 |
| Grant date | Jul 1, 1980 |
| Priority date | — |
| Expiry date | Dec 12, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/0737
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improved composite emission material for use in the electrodes of high intensity (HID) lamps comprising a reacted mixture of barium zirconate and strontium zirconate wherein the ratio of barium to strontium is from between 9:1 to 1:1 and is preferably 4:1. The improved emission material has a lower vapor pressure, higher melting point and a reduced processing time as compared to prior art emission materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.