Effect of Microimpurities on the Electronic Structure and Emission Properties of Microwave Device Cathode Materials

The effect of microimpurities on the electronic structure of barium oxide has been studied using optical and electron spectroscopy. As was shown previously, oxygen vacancies play a decisive role in the formation of the emission properties of barium oxide crystallites; however, the possible role of m...

Full description

Saved in:
Bibliographic Details
Published in:Inorganic materials : applied research 2019-09, Vol.10 (5), p.1065-1071
Main Authors: Kapustin, V. I., Li, I. P., Shumanov, A. V., Moskalenko, S. O., Svitov, V. I.
Format: Article
Language:English
Subjects:
Barium
Barium oxides
Cathodes
Chemistry
Chemistry and Materials Science
Crystallites
Electrode materials
Electronic Engineering Materials
Electronic structure
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Lattice vacancies
Materials Science
Nickel
Oxygen
Scandium
Vacancies
Valence band
Work functions
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The effect of microimpurities on the electronic structure of barium oxide has been studied using optical and electron spectroscopy. As was shown previously, oxygen vacancies play a decisive role in the formation of the emission properties of barium oxide crystallites; however, the possible role of microimpurities in barium oxide crystallites was not considered. It has been established that some microimpurities, including nickel, scandium, and combination of calcium and strontium, order oxygen vacancies in barium oxide crystallites, which directly affects oxygen diffusion in them. Nickel and scandium impurities form additional surface states near the edge of the valence band, which is accompanied by a decrease in the electronic work function of a cathode material.
ISSN:2075-1133
2075-115X
DOI:10.1134/S2075113319050113