Cathode for electron tube and manufacturing method thereof

Details Cathode for electron tube and manufacturing method thereof Cathode for electron tube and manufacturing method thereof

1986-05-16

1989-09-05

Groody, James J.

Electric lamp and discharge devices

Electrode and shield structures

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

313355, 252521, H01J 120

Patent

active

048641871

ABSTRACT:
A cathode for an electron tube in accordance with the present invention comprises: a base containing not only nickel as a major element but also a reducing agent; a layer of an electron-emissive substance which is applied to the base and contains not only an alkaline earth metal oxide as a principal component but also a scandium oxide; and a heater for heating the layer.

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Haas et al., Interatomic Auger Analysis of the Oxidation of Thin Barium Films, Applications of Surface Science 16, North Holland Publishing Co. (1983) pp. 142-143, 148-149 and 156-162.
Yamamoto et al., Electron Emission Properties and Surface Atom Behavior of Impregnated Cathodes with Rare Earth Oxide Mixed Matrix Base Metals, Applications of Surface Science 20, Elseview Science Publishers B.V. (1984) pp. 61-83.
R. O. Jenkins, A Review of Thermionic Cathodes, Vacuum, vol. 19, No. 8, Pergamon Press Limited, Great Britain, Sections 4.2 and 4.2.2.

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