Impregnated yttric or gadolinium-containing Barium-aluminum-scandate cathodes and their fabrication methods
US9349561B2 · kind B2 · utility
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Key dates
| Filing date | Dec 30, 2011 |
| Grant date | May 24, 2016 |
| Priority date | — |
| Expiry date | Nov 10, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J23/05
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Impregnated rare earth metal-containing barium-aluminum-scandate cathodes with a rare earth oxide doped tungsten matrix and methods for the fabrication thereof are described. In one aspect, an impregnated rare earth metal-containing barium-aluminum-scandate cathode comprises: a rare earth oxide doped tungsten matrix, and an impregnated active substance. The active substance comprises scandium oxide (Sc2O3), a second rare earth oxide, and barium calcium aluminate, wherein the molar ratio of Ba:Ca:Al is about 4:1:1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.