Mixed dopant effect in SrZrO3-based proton conductor

被引：7

作者：

Omata, Takahisa ^{[1
]}

Fuke, Tomonao ^{[1
]}

Otsuka-Yao-Matsuo, Shinya ^{[1
]}

机构：

[1] Osaka Univ, Grad Sch ofEngineering, Div Mat Sci & Mfg, Suita, Osaka 5650871, Japan

来源：

SOLID STATE IONICS | 2008年 / 179卷 / 21-26期

关键词：

proton conductor; infrared spectroscopy; dopant segregation; proton dissolution environment;

D O I：

10.1016/j.ssi.2008.01.029

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The infrared diffuse reflectance spectra in the O-H stretching vibration, v(OH), region and the electrical conductivities of Sr(Zr0.92Y0.08-xScx)O3-delta and Sr(Zr0.92Y0.08-xGax)O3-delta were studied. Whereas the dissolution environment of the proton and the dopant in the terminal compounds was maintained in the Sr(Zr0.92Y0.08-xScx)O3-delta, distinctly different proton sites from those intheterminal Sr(Zr0.92Y0.08)O3-delta and Sr(Zr0.92Ga0.08)O3-delta appeared in the Sr (Zr0.92Y0.08-xGax)O3-delta. The electrical conductivity of the Sr(Zr0.92Y0.08-xScx)O3-delta showed a very small increase upon substitution of Y by Sc. The small increase in conductivity for the Sc-doped case was discussed from the viewpoint of proton mobility. For the Sr(Zr0.92Y0.08-xGax)O3-delta, the conductivity decreased over an order of magnitude by the substitution of Y by Ga. This decrease in conductivity for the Ga-doped case was attributed to the decrease in the proton concentration. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：1116 / 1119

页数：4

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