MECHANISM OF REACTION BETWEEN LANTHANUM MANGANITE AND YTTRIA-STABILIZED ZIRCONIA

被引：143

作者：

TAIMATSU, H ^{[1
]}

WADA, K ^{[1
]}

KANEKO, H ^{[1
]}

YAMAMURA, H ^{[1
]}

机构：

[1] TOSOH CO,TSUKUBA RES LAB,TSUKUBA 305,JAPAN

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1992年 / 75卷 / 02期

关键词：

lanthanum; manganites; reactions; solid state; zirconia—yttria stabilized;

D O I：

10.1111/j.1151-2916.1992.tb08193.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The reaction of La1-xCaxMnO3 (x = 0, 0.1, 0.2) with ZrO2-8 mol% Y2O3 (YSZ) has been investigated at temperatures ranging from 1300-degrees to 1425-degrees-C in air. Substitution of Ca for La in LaMnO3 depresses the reactivity with YSZ. A layer of La2Zr2O7 is formed at the La1-xCaxMnO3/YSZ interface after an induction period, and its formation is accelerated when the La1-xCaxMnO3 phase is porous. The reaction proceeds by unidirectional diffusion of La, Mn, and/or Ca ions, mainly Mn ions, into YSZ. The diffusion coefficients of La and Mn ions in YSZ, which are estimated using a LaMnO3/single-crystal YSZ couple, are much lower than that of oxygen ion. From the experimental data, a reaction mechanism is proposed.

引用

页码：401 / 405

页数：5

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