Methods of making thermionic cathode using oxygen deficient and

Details Methods of making thermionic cathode using oxygen deficient and Methods of making thermionic cathode using oxygen deficient and

1998-01-23

1999-09-14

Ramsey, Kenneth J.

Electric lamp or space discharge component or device manufacturi

Process

Electrode making

H01J 904

Patent

active

059513527

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.

REFERENCES:
patent: 5132081 (1992-07-01), Lee

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