期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 35, 期 14, 页码 7295-7301出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2010.04.149
关键词
Critical radius; Tolerance factor; Cubic perovskite oxides; Oxygen ion conduction
资金
- 863 Program National High Technology Research Development Project of China [2006AA11A189]
- National Nature Science Foundation of China [20973021]
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.
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