Oxide cathode

Details Oxide cathode Oxide cathode

1990-03-30

1991-12-24

Yusko, Donald J.

Electric lamp and discharge devices

Electrode and shield structures

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

313346R, H01J 1906

Patent

active

050755897

ABSTRACT:
The emission properties of oxide cathodes, in which yttrium oxide, scandium oxide or a rare earth oxide is added to the electron-emissive material, are improved by using fine-grained yttrium, scandium or rare earth oxide.

REFERENCES:
patent: 4675091 (1987-05-01), Thomas et al.
patent: 4797593 (1989-01-01), Saito et al.
patent: 4864187 (1989-09-01), Sano et al.

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