Thermionic emission cathode and preparation thereof

Electric lamp and discharge devices – Electrode and shield structures – Cathodes containing and/or coated with electron emissive...

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313336, 445 51, H01J 114, H01J 1906, H01K 104

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active

044828390

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.

REFERENCES:
patent: 3312856 (1967-04-01), Lafferty et al.
patent: 3440475 (1969-04-01), Schiller et al.
patent: 3823337 (1974-05-01), Johannes et al.
patent: 3833494 (1974-09-01), Johannes et al.
patent: 4055780 (1977-10-01), Kawai et al.
patent: 4137476 (1979-01-01), Ishii
patent: 4168565 (1979-09-01), Ishii et al.

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