Alkaline earth metal oxide cathode containing rare earth metal o

Details Alkaline earth metal oxide cathode containing rare earth metal o Alkaline earth metal oxide cathode containing rare earth metal o

1991-09-11

1992-09-08

DeMeo, Palmer C.

Electric lamp and discharge devices

Electrode and shield structures

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

H01J 114, H01J 120

Patent

active

051461315

ABSTRACT:
The zero-hour emission of oxide cathodes comprising for example BaO.SrO as an emissive material is improved by adding europium oxide or ytterbium oxide. Moreover, addition of lutetium oxide improves the lifetime properties.

REFERENCES:
patent: 3719856 (1973-03-01), Koppius
patent: 4675570 (1987-06-01), Green
patent: 4752713 (1988-06-01), Buxbaum

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