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The Influence of Laterally Inhomogeneous Contacts on the Impedance of Solid Materials: A Three-Dimensional Finite-Element Study

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Abstract

The total impedance of samples with electrodes exhibiting only partial contact (porous electrodes) is investigated using the finite element method in three dimensions. Emphasis is put on porous electrodes built up of arrays of small perfect contacts. An equivalent circuit to analyze the impedance spectra is put on a firm basis enabling the reliable determination of bulk properties of “imperfectly” contacted samples. Approximations are given to estimate the contact geometry impedance. The results are also applicable to other imperfect contact problems as occurring at grain boundaries.

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  1. Max-Planck-Institut fu¨r Festko¨rperforschung, Heisenbergstr. 1, 70569, Stuttgart, Germany

    J Fleig & J Maier

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  1. J Fleig
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  2. J Maier
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Fleig, J., Maier, J. The Influence of Laterally Inhomogeneous Contacts on the Impedance of Solid Materials: A Three-Dimensional Finite-Element Study. Journal of Electroceramics 1, 73–89 (1997). https://doi.org/10.1023/A:1009902532596

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