Transport processes in mixed conducting oxides: combining time domain experiments and frequency domain analysis

被引：24

作者：

Boukamp, BA ^{[1
]}

den Otter, MW ^{[1
]}

Bouwmeester, HJM ^{[1
]}

机构：

[1] Univ Twente, Dept Sci & Technol, Lab Inorgan Mat Sci, NL-7500 AE Enschede, Netherlands

来源：

JOURNAL OF SOLID STATE ELECTROCHEMISTRY | 2004年 / 8卷 / 09期

关键词：

conductivity relaxation; mixed ionic-electronic conduction; oxygen diffusion; Fourier transform; impedance analysis;

D O I：

10.1007/s10008-003-0493-6

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The conductivity relaxation (CR) method is often used for measuring the surface transfer rate, K-tr, and the bulk diffusion coefficient, <<(D)over tilde>, for oxygen transport in mixed conducting oxides (MIECs). The time domain analysis of the obtained CR response is rather complex and is based on 'ideal' behaviour for the diffusion process. It is quite favourable to perform the data analysis in the frequency domain, where 'non-ideal' responses are easily recognised. Besides, frequency domain analysis (impedance spectroscopy) can yield reliable parameter estimates. Using a discrete Fourier-transform procedure, the time domain responses can be transformed to a frequency domain impedance-type expression. This approach can be applied to any system for which a driving force and a resulting flux can be defined.

引用

页码：592 / 598

页数：7

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