Impregnation type cathode for a cathodic ray tube

Details Impregnation type cathode for a cathodic ray tube Impregnation type cathode for a cathodic ray tube

1997-03-17

1998-05-05

O'Shea, Sandra L.

Electric lamp and discharge devices

Electrode and shield structures

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

313346DC, H01J 1906, H01J 114

Patent

active

057479216

ABSTRACT:
An impregnation type cathode for a cathode ray tube includes a porous cathode piece having electron emission material impregnated therein. The porous cathode piece has a layer of W--Sc (or a layer of W--Sc.sub.2 O.sub.3) on its surface and a layer of alloy formed of at least two elements of a group of elements consisting of Ir, Os, Ru, and Re on the layer of W--Sc (or the layer of W--SC.sub.2 O.sub.3)

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