HID lamp electrode comprising solid solution of dibarium calcium molybdate and tungstate
US4123685A · kind A · utility
4Cited by
2References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 21, 1977 |
| Grant date | Oct 31, 1978 |
| Priority date | — |
| Expiry date | Oct 21, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/0737
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
For HID lamps, and particularly high-pressure sodium-mercury HID lamps, the electron-emissive material portion of the lamp electrodes is a solid solution of dibarium calcium tungstate and dibarium calcium molybdate wherein the molar ratio of tungstate to molybdate is from 9:1 to 1:9. Emissive properties of the electrode are good and vapor pressure of emissive material is low.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.