LIQUID-PHASE-ASSISTED SINTERING OF CALCIUM-DOPED LANTHANUM CHROMITES

被引：93

作者：

SAKAI, N

KAWADA, T

YOKOKAWA, H

DOKIYA, M

KOJIMA, I

机构：

[1] National Chemical Laboratory for Industry, Tsukuba Research Center, Ibaraki

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1993年 / 76卷 / 03期

关键词：

D O I：

10.1111/j.1151-2916.1993.tb03649.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：

Investigations have been made on the low-temperature sinterability of calcium-doped lanthanum chromites which are to be used as interconnectors in solid oxide fuel cells (SOFCs). Nominally chromium deficient lanthanum calcium chromites (La0.7Ca0.3Cr1-yO3, y = 0.02) were found to be sinterable to 94% theoretical density at 1573 K in air, whereas no densification was observed for samples with y = 0. The two-step shrinkage process suggests a liquid-phase sintering mechanism with calcium oxychromates playing an important role as the liquid phase. After sintering at 1573 K, calcium-rich substances remained at grain boundaries.

引用

页码：609 / 616

页数：8

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