Effect of acceptor substitution in perovskites La1-x A x MnO3 ± δ (A = Ca, Sr, Ba) on the kinetics of interaction of gas-phase oxygen

被引：6
|
作者：
Porotnikova, N. M. [1 ]
Ananyev, M. V. [1 ,2 ]
Eremin, V. A. [1 ]
Molchanova, N. G. [1 ]
Kurumchin, E. Kh. [1 ]
机构：
[1] Russian Acad Sci, Ural Branch, Inst High Temp Electrochem, Ul Akad Skaya 20, Ekaterinburg, Russia
[2] Ural Fed Univ, Ul Mira 19, Ekaterinburg, Russia
来源：
RUSSIAN JOURNAL OF ELECTROCHEMISTRY | 2016年 / 52卷 / 08期
基金：
俄罗斯基础研究基金会;
关键词：
isotope exchange of oxygen; La(1-x)A(x)MnO(3 +/-delta); charge number; rate-determining stage; defective structure; dissociative adsorption; DOPED LAMNO3; EXCHANGE; DEFECT; CONDUCTIVITY; DIFFUSION;
D O I：
10.1134/S1023193516080103
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The kinetics of interaction of gas-phase oxygen with oxygen of perovskite-like manganites La1 - x A (x) MnO3 +/- delta (A = Ca, Sr, Ba) at a temperature of 850A degrees C and an oxygen pressure of 1 kPa was studied by isotope exchange of oxygen with analysis of the gas phase. The rates of the interphase exchange, dissociative adsorption, and incorporation of oxygen in the crystal lattice of perovskites La(0.7)A(0.3)MnO(3 +/- delta) (A = Ca, Sr, Ba) and La1-x Sr (x) MnO3 +/- delta (x = 0, 0.3, 0.4) were calculated. The dissociative adsorption of oxygen was found to be the limiting stage of the exchange. The influence of the defective structure of oxide La1 - x A (x) MnO3 +/- delta on the mechanism of exchange with oxygen of the gas phase was discussed.
引用
收藏
页码：717 / 722
页数：6
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