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

1989-07-10

1991-05-14

Bell, Janyce

Coating processes

Electrical product produced

Electron emissive or suppressive

4271262, 4271263, B05D 512

Patent

active

050154974

ABSTRACT:
A cathode for an electron tube in accordance with the present invention comprises: a base (2) containing not only nickel as a major element but also a reducing agent; a layer (3) of an electron-emissive substance which is applied to the base (2) 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 (3).

REFERENCES:
patent: 4216408 (1980-08-01), Verstegen et al.
patent: 4441049 (1984-04-01), Verstegen et al.
patent: 4518890 (1985-05-01), Taguchi et al.

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