In situ monitoring and quantitative analysis of oxygen diffusion through Schottky-barriers in SrTiO3 bicrystals

被引：84

作者：

Leonhardt, M ^{[1
]}

Jamnik, J ^{[1
]}

Maier, J ^{[1
]}

机构：

[1] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 1999年 / 2卷 / 07期

关键词：

D O I：

10.1149/1.1390827

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The blocking effect of boundaries in SrTiO3 bicrystals on the chemical diffusion of oxygen is monitored in situ. The optical technique that is applied allows precise recording of spatial profiles as a function of time. The low symmetrical boundary (near Sigma 13) shows a pronounced chemical resistance reflected by a distinct jump of the diffusion profiles, while the highly symmetrical Sigma 3 boundary exhibits no measurable influence. The effects can be quantitatively explained by Schottky barriers and the diffusion profiles precisely modeled with the space-charge potential as the only unknown parameter. The space-charge potentials are in good agreement with the values derived from impedance analysis. (C) 1999 The Electrochemical Society. S1099-0062(98)12-024-7. All rights reserved.

引用

页码：333 / 335

页数：3

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