Electronic Structure of Variants of Compositions of Scandate and Nickel-Oxide Cathodes of Microwave Devices

By methods of electron spectroscopy for chemical analysis and spectroscopy of characteristic losses of electron energy, the electronic structure of barium oxide crystallites doped with other chemical elements, including scandium from scandium-containing phases, was investigated. The physical and phy...

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Bibliographic Details
Published in:Technical physics 2023-12, Vol.68 (Suppl 2), p.S169-S177
Main Authors: Kapustin, V. I., Li, I. P., Serpichev, A. S., Shumanov, A. V., Kozhevnikova, N. E.
Format: Article
Language:English
Subjects:
Analysis
Barium
Barium oxides
Cathodes
Chemical analysis
Chemical elements
Classical and Continuum Physics
Crystallites
Electron energy
Electronic structure
Microwave devices
Nickel
Physics
Physics and Astronomy
Rare earth metals
Scandium
Thermionic emission
Valence band
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Summary:By methods of electron spectroscopy for chemical analysis and spectroscopy of characteristic losses of electron energy, the electronic structure of barium oxide crystallites doped with other chemical elements, including scandium from scandium-containing phases, was investigated. The physical and physicochemical conditions are formulated, the fulfillment of which allows to form the electronic structure of the scandate cathode with a high level of thermionic emission: the achievement of the minimum ratio of the surface volume concentration of oxygen vacancies and the maximum distance between the top of the valence band and the Fermi level.
ISSN:1063-7842
1090-6525
DOI:10.1134/S1063784223900450