Cathode material
US11315782B2 · kind B2 · utility
0Cited by
4References
17Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Apr 26, 2018 |
| Grant date | Apr 26, 2022 |
| Priority date | — |
| Expiry date | Dec 14, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J9/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A cathode material for use in a high-pressure discharge lamp contains a matrix based on tungsten having a tungsten content of greater than or equal to 95% by weight, tungsten carbide, and oxides and/or predominantly oxidic phases of one or more emitter elements from the group of rare earth metals, Hf, and Zr. The cathode material additionally contains predominantly carbidic phases of the one or more emitter elements from the group of rare earth metals, Hf, and Zr. A high-pressure discharge lamp would contain such a cathode composed of the above cathode material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.