Cathode for electron tube

Details Cathode for electron tube Cathode for electron tube

H - Electricity

01

J

31/122, 313/187,

H01J 1/14 (2006.01) H01J 1/142 (2006.01) H01J 29/04 (2006.01)

Patent

CA 1270890

ABSTRACT OF THE DISCLOSURE A cathode of the indirect heated type is disclosed having improved electron emission characteristics. The cathode for an electron tube in accordance with the present invention comprises a base containing Ni as a major element; and a layer of an electron-emissive substance formed on the base. This layer comprises as a principal component alkaline earth metal oxide containing at least Ba, and from 0.1 to 20 weight percent of rare earth metal oxide or from 0.05 to 15 weight percent of a rare earth metal.

513900

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