Achieving fast oxygen diffusion in perovskites by cation ordering

被引：427

作者：

Taskin, AA ^{[1
]}

Lavrov, AN ^{[1
]}

Ando, Y ^{[1
]}

机构：

[1] Cent Res Inst Elect Power Ind, Tokyo 2018511, Japan

来源：

APPLIED PHYSICS LETTERS | 2005年 / 86卷 / 09期

关键词：

D O I：

10.1063/1.1864244

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The oxygen-exchange behavior has been studied in half-doped manganese and cobalt perovskite oxides. We have found that the oxygen diffusivity in Gd0.5Ba0.5MnO3-delta can be enhanced by orders of magnitude by inducing crystallographic ordering among lanthanide and alkali-earth ions in the A-site sublattice. Transformation of a simple cubic perovskite, with randomly occupied A sites, into a layered crystal GdBaMn2O5+x (or isostructural GdBaCo2O5+x for cobalt oxide) with alternating lanthanide and alkali-earth planes reduces the oxygen bonding strength and provides disorder-free channels for ion motion, pointing to an efficient way to design new ionic conductors. (C) 2005 American Institute of Physics.

引用

页码：1 / 3

页数：3

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[11] Materials for fuel-cell technologies [J].