Thermionic cathode using oxygen deficient and fully oxidized mat

Details Thermionic cathode using oxygen deficient and fully oxidized mat Thermionic cathode using oxygen deficient and fully oxidized mat

1996-05-14

1998-10-27

Dombroske, George M.

Electric lamp and discharge devices

Electrode and shield structures

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

313346DC, H01J 114, H01J 1906, H01K 104

Patent

active

058281649

ABSTRACT:
A method is provided of preparing an impregnated cathode with enhanced thionic emission from a porous billet by impregnating the billed with a suitable impregnant in the presence of an oxygen deficient compound. Additives such as Ir, Os, and Rh react in such a way as to increase emission by reacting to generate oxygen deficient compounds such as WO.sub.2. Moreover, intermediate oxygen sufficient products formed in the chemical reactions can be used as impregnants providing they generate oxygen deficient compounds in the presence of the active emissive material.

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