Dielectric Relaxations of Y-Doped ZrO2 Single Crystal

Frequency dependences of dielectric constant (epsilonr) for 9 mol% Y2O3 doped ZrO2 (YSZ) single crystal which is a typical oxide-ion conductor was successfully explained by the superimposition of both electrolyte-electrode interfacial and Debye-type polarizations. Three kinds of Debye-type polarizat...

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Published inNihon Seramikkusu Kyōkai gakujutsu ronbunshi Vol. 115; no. 1345; pp. 546 - 550
Main Authors Yamamura, Hiroshi, Yagi, Yuhji, Kakinuma, Katsuyoshi
Format Journal Article
LanguageJapanese
Published 01.09.2007
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Summary:Frequency dependences of dielectric constant (epsilonr) for 9 mol% Y2O3 doped ZrO2 (YSZ) single crystal which is a typical oxide-ion conductor was successfully explained by the superimposition of both electrolyte-electrode interfacial and Debye-type polarizations. Three kinds of Debye-type polarizations were observed at fairly high temperatures. The two polarizations were ascribed to defect associates, (YZr-Vo**)Dt, which were observed in the tan delta spectra. The third polarization in the high frequency region was ascribed to a long range migration of oxygen vacancy, which was observed in the Mspectra. The sigmaac dispersion was also explained by the Debye-type polarizations.
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ISSN:0914-5400