Enhanced ionic transport in fine-grained scandia-stabilized zirconia ceramics

被引：27

作者：

Abdala, Paula M. ^{[1
]}

Custo, Graciela S. ^{[2
]}

Lamas, Diego G. ^{[1
]}

机构：

[1] CITEFA, CONICET, CINSO, Pcia De Buenos Aires, Argentina

[2] Comis Nacl Energia Atom, Ctr Atom Constituyentes, Dept Quim Analit, Gerencia Area Seguridad Nucl & Ambiente, Pcia De Buenos Aires, Argentina

来源：

JOURNAL OF POWER SOURCES | 2010年 / 195卷 / 11期

关键词：

ZrO2-Sc2O3; Ceramics; Electrical properties; Grain-boundary diffusion; ELECTRICAL-CONDUCTIVITY; NANOCRYSTALLINE CERIA; BOUNDARY CONDUCTIVITY; SOLUTE SEGREGATION; DOPED ZIRCONIA; IMPEDANCE; MICROSTRUCTURE; ELECTROLYTES; DIFFUSION;

D O I：

10.1016/j.jpowsour.2009.12.035

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：

In this work, the transport properties of fine-grained scandia-stabilized zirconia ceramics with low Si content have been investigated. These materials were prepared from ZrO2-6 mol% Sc2O3 nanopowders synthesized by a nitrate-lysine gel-combustion route. High relative densities and excellent electrical properties were obtained, even for sintering temperatures as low as 1350 degrees C. Our electrochemical impedance spectroscopy study showed that both the volume fraction of grain boundaries and the specific grain-boundary conductivity are significantly enhanced with decreasing grain size, resulting in a higher total ionic conductivity. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：3402 / 3406

页数：5

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