Vacuum electron tube having an oxide cathode comprising...

Details Vacuum electron tube having an oxide cathode comprising... Vacuum electron tube having an oxide cathode comprising...

H - Electricity

01

J

313/130, 313/183

H01J 1/14 (2006.01) H01J 1/142 (2006.01) H01J 1/26 (2006.01)

Patent

CA 1274580

RCA 81,183 ABSTRACT OF THE DISCLOSURE In a vacuum electron tube, a novel oxide cathode comprising a metal substrate, means for heating said substrate to its operating temperature, and a layer of alkaline-earth-metal oxide on the substrate. The substrate is essentially free from silicon and contains operative concentrations greater than 1.0 weight % of chromium metal for progressively migrating into the oxide layer and reducing the oxide to yield alkaline-earth-metal.

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