Authors: Bernard A Boukamp Matthijs W den Otter Henny J M Bouwmeester
Publish Date: 2004/02/21
Volume: 8, Issue: 9, Pages: 592-598
Abstract
The conductivity relaxation CR method is often used for measuring the surface transfer rate Ktr and the bulk diffusion coefficient tildeD 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 ‘nonideal’ responses are easily recognised Besides frequency domain analysis impedance spectroscopy can yield reliable parameter estimates Using a discrete Fouriertransform procedure the time domain responses can be transformed to a frequency domain impedancetype expression This approach can be applied to any system for which a driving force and a resulting flux can be defined
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