Nearly constant loss in crystalline oxide-ion conductor Gd2Zr2O7

We present a study of the nearly constant loss regime in the oxide-ion conductor Gd 2 Zr 2 O 7 by using Impedance Spectroscopy measurements. At enough low temperature, between 173 and 253 K, the dielectric loss is found to be almost temperature and frequency independent within the whole experimental...

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Bibliographic Details
Published in:Journal of electroceramics 2015-02, Vol.34 (1), p.15-19
Main Authors: Díaz-Guillén, M. R., Frechero, M. A., Díaz-Guillén, J. A., Fuentes, A. F., León, C.
Format: Article
Language:English
Subjects:
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Composites
Crystallography and Scattering Methods
Electrochemistry
Glass
Materials Science
Natural Materials
Optical and Electronic Materials
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Summary:We present a study of the nearly constant loss regime in the oxide-ion conductor Gd 2 Zr 2 O 7 by using Impedance Spectroscopy measurements. At enough low temperature, between 173 and 253 K, the dielectric loss is found to be almost temperature and frequency independent within the whole experimental frequency range (10 Hz – 1 MHz). However, a symmetric and very broad relaxation peak is clearly resolved in the loss spectra. This peak shows a thermally activated peak frequency with activation energy E τ  = 0.29 ± 0.02 eV, and its origin is discussed in terms of previously proposed models for the nearly constant loss.
ISSN:1385-3449
1573-8663
DOI:10.1007/s10832-014-9907-3