Dependence of critical radius of the cubic perovskite ABO3 oxides on the radius of A- and B-site cations

被引：102

作者：

Xu, Nansheng ^{[1
]}

Zhao, Hailei ^{[1
,3
]}

Zhou, Xiong ^{[1
]}

Wei, Wenjing ^{[1
]}

Lu, Xionggang ^{[2
]}

Ding, Weizhong ^{[2
]}

Li, Fushen ^{[1
,3
]}

机构：

[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China

[2] Shanghai Univ, Sch Mat Sci & Engn, Shanghai 200072, Peoples R China

[3] Beijing Key Lab New Energy Mat & Technol, Beijing 100083, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2010年 / 35卷 / 14期

关键词：

Critical radius; Tolerance factor; Cubic perovskite oxides; Oxygen ion conduction; OXYGEN PERMEABILITY; ELECTRONIC CONDUCTIVITY; HYDROGEN SEPARATION; SOLID ELECTROLYTES; ION CONDUCTIVITY; STABILITY; CATHODE; PERFORMANCE; TRANSPORT; MEMBRANES;

D O I：

10.1016/j.ijhydene.2010.04.149

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：

Critical radius (r(C)) for cubic perovskite structure is an important factor affecting the migration energy of oxygen ions. The monotonic dependence of the critical radius on the ionic radii of A- and B-site cations in cubic perovskite ABO(3) structure was systematically investigated by strict mathematical derivation. When the tolerance factor (t) < 1, the critical radius is a decreasing function but an increasing function with respect to the radius of A-site cation (r(A)) and B-site cation (r(B)), respectively. For the case of t > 1, there is a reverse dependence of r(C) on r(A) and r(B). With respect to the case of t = 1, r(C) displays a decreasing function with respect to both r(A) and r(B). (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.

引用

页码：7295 / 7301

页数：7

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