Directly heated oxide cathode and production thereof

Details Directly heated oxide cathode and production thereof Directly heated oxide cathode and production thereof

1980-09-12

1984-05-01

Dixon, Harold

Electric lamp and discharge devices

Electrode and shield structures

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

H01J 1104

Patent

active

044464045

ABSTRACT:
A directly heated type oxide cathode comprising a base made of an alloy containing Ni as a major component and Zr as a reducing agent, a coating of Co powders or a mixture of Ni powders and Co powders wherein the average particle size of the Co powders is smaller than that of Ni powders formed on the base, and an electron emissive alkaline earth oxide layer formed on the coating of Co powders or the mixture of Ni powders and Co powders does not show deformation of the base or peeling of the oxide layer during the production procedure or operation of electron tubes and the like.

REFERENCES:
patent: 4081713 (1978-03-01), Musumi
patent: 4129801 (1978-12-01), Soeno et al.
patent: 4313854 (1982-02-01), Sunhara et al.

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