Impregnated cathode having cathode base body and refractory meta

Details Impregnated cathode having cathode base body and refractory meta Impregnated cathode having cathode base body and refractory meta

1987-09-02

1989-05-23

Wieder, Kenneth

Electric lamp and discharge devices

Electrode and shield structures

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

313346DC, H01J 128

Patent

active

048333611

ABSTRACT:
An impregnated cathode which has a portion where no electron emissive material is present on the surface layer of the cathode base body that is to be welded, in order that the cathode base body impregnated with the electron emissive material, a cup and a cathode sleeve can be firmly welded together. The cathode base body which has no electron emissive material on the surface layer is obtained by washing the cathode base body in a solvent which is capable of dissolving the electron emissive material. Using this cathode base body, the impregnated cathode is fabricated.

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