Preparation, characterization and electrical property of Mn-doped ceria-based oxides

被引：63

作者：

Kang, Ch. Y. ^{[1
]}

Kusaba, H.

Yahiro, H.

Sasaki, K.

Teraoka, Y.

机构：

[1] Kyushu Univ, Interdisciplinary Grad Sch Engn Sci, Dept Mol & Mat Sci, Kasuga, Fukuoka 8168580, Japan

[2] Kyushu Univ, Fac Engn Sci, Dept Mol & Mat Sci, Kasuga, Fukuoka 8168580, Japan

[3] Ehime Univ, Fac Engn, Dept Appl Chem, Matsuyama, Ehime 7908577, Japan

来源：

SOLID STATE IONICS | 2006年 / 177卷 / 19-25期

关键词：

Mn-doped ceria-based oxides; electrical property; dual-phase mixed conductor;

D O I：

10.1016/j.ssi.2006.04.016

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：

Manganese-doped ceria-based oxides, Ce1-xMnxO2-delta (0.05 <= x <= 0.3) and Ce1-x-yGdxMnyO2-delta (0.05 <= x <= 0.2, 0.05 <= y <= 0.25) were synthesized, and crystal phase analysis by XRD and measurements of electrical properties were performed. Solubility limit of Mn in Ce1-xMnxO2-delta seemed to be between 5 mol% and 10 mol% and Mn3O4 Was the main by-product above the solubility limit in the case of heat treatment at 1300 degrees C. Judging from the oxygen partial pressure dependence of total conductivity and emf measurements, Ce1-xMnxO2-delta is a single-phase mixed conductor within the composition below the solubility limit, and when the composition of Mn exceeds the solubility limit, it becomes the dual-phase mixed conductor of Ce1-xMnxO2-delta and Mn3O4. The doing of Mn in gadlia-doped ceria, Ce1-x-yGdxMnyO2-delta (0.05 <= x <= 0.2, 0.05 <= y <= 0.25), was more difficult than that in CeO2 presumably due to the preferential reaction between Gd and Mn to give GdMnO3 to the GDC solid solution formation, and the Mn doping seems not to be so effective in preparing the mixed ionic-electronic conductor based on GDC. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：1799 / 1802

页数：4

共 7 条

[1]

Bouwmeester H.J.M., 1996, Membrane Science and Technology, V4, P435

[2]

Dell RM., 1978, SOLID ELECT GEN PRIN, P291

[3] OXYGEN ION CONDUCTION OF FLUORITE-TYPE CE1-XLNXO2-X-2 (LN= LANTHANOID ELEMENT) [J].