Study of the oxygen exchange kinetics in the nonstoichiometric oxide SrFeO3–δ under isostoichiometric conditions using the oxygen partial pressure relaxation technique

The kinetics of oxygen exchange in the nonstoichiometric strontium ferrite SrFeO 3–δ with the structure of cubic perovskite was studied by the oxygen partial pressure relaxation technique in the isostoichiometric regime at temperatures of 500–900°C in a range of δ from 0.24 to 0.44. An increase in t...

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Bibliographic Details
Published inKinetics and catalysis Vol. 57; no. 5; pp. 697 - 703
Main Authors Bychkov, S. F., Popov, M. P., Nemudry, A. P.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.09.2016
Springer Nature B.V
Subjects
Activation energy
Catalysis
Chemistry
Chemistry and Materials Science
Perovskites
Physical Chemistry
kinetics of oxygen exchange
nonstoichiometric perovskites
isostoichiometric conditions
partial pressure relaxation
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Summary:The kinetics of oxygen exchange in the nonstoichiometric strontium ferrite SrFeO 3–δ with the structure of cubic perovskite was studied by the oxygen partial pressure relaxation technique in the isostoichiometric regime at temperatures of 500–900°C in a range of δ from 0.24 to 0.44. An increase in the oxygen nonstoichiometry δ was accompanied by a decrease in the rate of sample relaxation and by an increase in the apparent activation energy of oxygen exchange.
ISSN:0023-1584
1608-3210
DOI:10.1134/S0023158416050050