High-brightness lanthanum hexaboride cathode and method for manufacturing of cathode
US10553388B1 · kind B1 · utility
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Key dates
| Filing date | Nov 28, 2018 |
| Grant date | Feb 4, 2020 |
| Priority date | — |
| Expiry date | Nov 28, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2237/065
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A thermionic cathode, an electron emission apparatus, and a method of fabricating the thermionic cathode are provided. The thermionic cathode includes an emitter. The emitter includes a lanthanum hexaboride (LaB6) crystal having a crystallographic orientation of (310). The operating temperature of the thermionic cathode is greater than 1800 K.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.