Vacuum electron tube having an oxide cathode comprising chromium reducing agent

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...

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Bibliographic Details
Main Author CHIANG; KENNETH K. T
Format Patent
LanguageEnglish
Published 27.02.1990
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
ELECTRICITY
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Summary: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.
Bibliography:Application Number: US19840675226