Method for manufacturing an impregnated cathode structure
US5236382A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 28, 1992 |
| Grant date | Aug 17, 1993 |
| Priority date | — |
| Expiry date | Aug 28, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J9/047
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a method for manufacturing an impregnated cathode structure, cleaning water under high pressure is sprayed onto a pellet with an impregnated cathode material, thereby eliminating residue adhering on the surface of the pellet. By spraying high-pressure cleaning water, a physical force is applied to only the surface of the pellet, thereby dissolving almost all the residue on the surface of the pellet, as well as portions of an electron emitting material. Thus, the electron emitting material existing adjacent to the surface does not become grown over the surface of the pellet during the partial degeneration thereof, and does not cover or damage a metal covering layer composed of at least any one of Ir, Os, Ru, Re, Sc, etc., and formed on the surface of the pellet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.