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

被引：4
|
作者：
Bychkov, S. F. [1 ]
Popov, M. P. [1 ]
Nemudry, A. P. [1 ,2 ]
机构：
[1] Russian Acad Sci, Inst Solid State Chem & Mechanochem, Siberian Branch, Novosibirsk 630128, Russia
[2] Natl Res Novosibirsk State Univ, Novosibirsk 630090, Russia
来源：
KINETICS AND CATALYSIS | 2016年 / 57卷 / 05期
关键词：
kinetics of oxygen exchange; nonstoichiometric perovskites; partial pressure relaxation; isostoichiometric conditions; SURFACE EXCHANGE; CONDUCTIVITY RELAXATION; REDOX ENERGETICS; TRANSPORT; DIFFUSION; PEROVSKITES; PERMEATION; STABILITY; SYSTEM; RELEASE;
D O I：
10.1134/S0023158416050050
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The kinetics of oxygen exchange in the nonstoichiometric strontium ferrite SrFeO3-delta with the structure of cubic perovskite was studied by the oxygen partial pressure relaxation technique in the isostoichiometric regime at temperatures of 500-900A degrees C in a range of delta from 0.24 to 0.44. An increase in the oxygen nonstoichiometry delta was accompanied by a decrease in the rate of sample relaxation and by an increase in the apparent activation energy of oxygen exchange.
引用
收藏
页码：697 / 703
页数：7
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