Method of making a long lived high current density cathode from tungsten and iridium powders
US4708681A · kind A · utility
4Cited by
3References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 6, 1987 |
| Grant date | Nov 24, 1987 |
| Priority date | — |
| Expiry date | Mar 6, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J9/047
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A long lived high current density cathode is made from a mixture of tungs and iridium powders by processing the mixture of powders with an activator into a porous billet, and then impregnating the billet with a chemical mixture of barium oxide, strontium oxide, and aluminum oxide by firing the billet in a dry hydrogen furnace at a temperature at which the impregnant melts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.