Oxide cathode with rare earth addition

Details Oxide cathode with rare earth addition Oxide cathode with rare earth addition

1993-04-21

1994-09-13

Yusko, Donald J.

Electric lamp and discharge devices

Electrode and shield structures

Cathodes containing and/or coated with electron emissive...

313346DC, H01J 1906

Patent

active

053471946

ABSTRACT:
The initial emission and the lifetime of oxide cathodes are considerably improved by adding small quantities of rare earth metals (10-500 ppm).

REFERENCES:
patent: 4359489 (1982-11-01), Corneille
patent: 4411827 (1983-10-01), Corneille
patent: 4797593 (1989-01-01), Saito et al.
patent: 4855637 (1989-08-01), Watanabe et al.
patent: 5072149 (1991-12-01), Lee et al.
patent: 5075589 (1991-12-01), Derks et al.

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