Cathode has incandescent emitter made from material, which emits electrons thermally, where emission layer is applied partially or completely on incandescent emitter

A cathode has an incandescent emitter (1), which is made from a material, which emits electrons thermally. An emission layer (3) having a thickness of 0.05-20mu m is applied partially or completely on the incandescent emitter, where the emission layer is made up of a material having a lower electron...

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Bibliographic Details
Main Authors NEUMEIER, ERNST, LENZ, EBERHARD
Format Patent
LanguageEnglish
German
Published 29.10.2009
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
ELECTRICITY
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Summary:A cathode has an incandescent emitter (1), which is made from a material, which emits electrons thermally. An emission layer (3) having a thickness of 0.05-20mu m is applied partially or completely on the incandescent emitter, where the emission layer is made up of a material having a lower electron work function than the material of the incandescent emitter. A diffusion barrier layer is also arranged between the incandescent emitter and the emission layer. Die Erfindung betrifft eine Kathode mit einem Glühemitter (1) aus einem Material, das Elektronen thermisch emittiert, wobei auf dem Glühemitter (1) zumindest teilweise eine Emissionsschicht (3) aus einem Material aufgebracht ist, das eine niedrigere Elektronenaustrittsarbeit (Phi) aufweist als das Material des Glühemitters (1). Eine derartige Kathode besitzt eine hohe Elektronenemission und eine hohe Lebensdauer.
Bibliography:Application Number: DE20081020163