Electrode Effects for Dielectric Properties of 8 mol% Y2O3 Stabilized ZrO2
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概要
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The frequency dependences of dielectric constant (εr′) for 8 mol% Y2O3 stabilized ZrO2 (8YSZ) with two kinds of electrodes, Pt and La0.6Ca0.4MnO3 (LCM), were successfully explained by the superposition of both electrolyte-electrode interfacial polarizations and Debye-type polarizations due to dopant-vacancy associates. The different behaviors in the frequency dependence of εr′ for 8YSZ having the different electrodes were ascribed to the dopant-vacancy associates, (YZr′–VO••) and (YZr′–VO••–YZr′), which were very large for 8YSZ with Pt electrode, but almost disappeared for 8YSZ with LCM electrode. The frequency dependences of the ac conductivity (σac) were also explained by the relaxation phenomena of the dopant-vacancy associates, suggesting that the dispersion of σac can not be ascribed to grain boundary effect of electrolyte.
- 公益社団法人 電気化学会の論文
著者
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KAKINUMA Katsuyoshi
Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University
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YAMAMURA Hiroshi
Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University
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Yamamura Hiroshi
Department Of Material And Life Chemistry Faculty Of Engineering Kanagawa University
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Yagi Yuhji
Department Of Material And Life Chemistry Faculty Of Engineering Kanagawa University
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Kakinuma Katsuyoshi
Department Of Material And Life Chemistry Faculty Of Engineering Kanagawa University
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