Scandate cathode and methods of making it
US5264757A · kind A · utility
4Cited by
12References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 30, 1990 |
| Grant date | Nov 23, 1993 |
| Priority date | — |
| Expiry date | Oct 30, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J1/28
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
To maintain a monolayer of scandium, which is necessary for a satisfactory emission on the surface of a scandate cathode, at least the top layer of the cathode is provided with a scandium-containing oxidic phase from which Scandium is supplied by segregation from this oxidic phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.