Patent · US Expired

Thermionic emission cathode and preparation thereof

US4482839A · kind A · utility

11Cited by
7References
7Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJan 20, 1982
Grant dateNov 13, 1984
Priority date
Expiry dateJan 20, 2002

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH01J1/15
  • WIPO fieldElectrical machinery, apparatus, energy
  • WIPO sectorElectrical engineering

Abstract

A thermionic emission cathode comprises a cathode tip made of an alkaline earth metal or rare earth metal hexaboride, a metallic support for supporting a base of said cathode tip and a reaction barrier layer comprising colloidal carbon and a reaction barrier material which bonds said cathode tip and said metallic support in one body.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.