Reaction mechanism between lanthanum manganite and yttria doped cubic zirconia

被引：53
|
作者：
Mori, M
Abe, T
Itoh, H
Yamamoto, O
Shen, GQ
Takeda, Y
Imanishi, N
机构：
[1] Mie Univ, Fac Engn, Dept Chem, Tsu, Mie 5148507, Japan
[2] Cent Res Inst Elect Power Ind, Yokosuka, Kanagawa 2400101, Japan
来源：
SOLID STATE IONICS | 1999年 / 123卷 / 1-4期
关键词：
solid oxide fuel cell; cathode material; thermal expansion; La0.9MnO3; La2Zr2O7;
D O I：
10.1016/S0167-2738(99)00115-0
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 reactivity between lanthanum deficient lanthanum manganite, La0.9MnO3, and yttria doped cubic zirconia (YSZ) has been examined at the temperature range between 1250 degrees C and 1400 degrees C. The reaction product of La2Zr2O7 was observed after some induced period, which depended on the reaction temperature and the yttrium content in YSZ. The induced period increased with increasing Y2O3 content in ZrO2. The reaction mechanism has been discussed with reference to the the difference of the solubility limit of Mn and La in YSZ. The solid solution of Mn saturated YSZ showed no reaction product even when reacted with La0.9MnO3 at high temperatures for long periods. All the reaction products formed by the reaction showed lower oxide ion conductivity than that of YSZ and had the different thermal expansion coefficient values from that of YSZ. (C) 1999 Elsevier Science B.V. All rights reserved.
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收藏
页码：113 / 119
页数：7
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