Study on the structural and electrical properties of Sr1-xCexMnO3-α (x=0.1, 0.3) perovskite oxide

被引：45

作者：

Hashimoto, S ^{[1
]}

Iwahara, H ^{[1
]}

机构：

[1] Nagoya Univ, Ctr Integrated Res Sci & Engn, Chikusa Ku, Nagoya, Aichi 4648603, Japan

来源：

MATERIALS RESEARCH BULLETIN | 2000年 / 35卷 / 14-15期

关键词：

oxides; X-ray diffraction; electrical properties; phase transitions; thermal expansion;

D O I：

10.1016/S0025-5408(00)00456-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We found that the partial substitution of Ce for Sr in SrMnO3 could stabilize the perovskite-type structure and made the conductivity increase. In the present study, the structural and electrical properties of Sr0.9Ce0.1MnO3-alpha were investigated by referring to those of Sr0.7Ce0.3MnO3-alpha Sr0.9Ce0.1MnO3-alpha showed the first-order transition from tetragonal to cubic at about 55 degreesC, at which a drastic change in the conductivity occurred. Above this temperature, the conductivity became very high, about 450 S.cm(-1) at 150 degreesC and 270 S.cm(-1) at 800 degreesC. In contrast, Sr0.7Ce0.1MnO3-alpha did not exhibit a drastic phase transition like that in the case of Sr0.9Ce0.1MnO3-alpha. The thermal expansion rate of Sr0.9Ce0.1MnO3-alpha was influenced by the phase transition, but the displacement observed by thermo-mechanical analysis (TMA) was slight at the phase: transition temperature. The chemical compatibility of Sr0.9Ce0.1MnO3-alpha with CeO2-based solid electrolyte was quite good at the fabrication temperature. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：2253 / 2262

页数：10

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