Oxide cathode and method of manufacturing powder...

Details Oxide cathode and method of manufacturing powder... Oxide cathode and method of manufacturing powder...

H - Electricity

01

J

313/183, 316/46

H01J 1/15 (2006.01) C22C 1/04 (2006.01) H01J 1/14 (2006.01) H01J 9/04 (2006.01)

Patent

CA 1139827

ABSTRACT By manufacturing the support of an oxide cathode consisting of powder metallurgical nickel in such manner that the reductor for the emissive coating consisting at least of one alkaline earth metal and oxygen is distributed inhomogeneously through the nickel and forms islands having a high reductor concentration in the surface of the support, an oxide cathode is obtained having a low sensitivity to poisoning of the cathode at the beginning of the operation thereof, and electric discharge tubes rapidly having good emissive properties can be manufactured with said cathodes.

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