OXYGEN PERMEATION MODELING OF LA1-YCAYCRO3-DELTA

被引：44

作者：

VANHASSEL, BA

KAWADA, T

SAKAI, N

YOKOKAWA, H

DOKIYA, M

机构：

[1] National Institute of Materials and Chemical Research, Tsukuba Research Center, Ibaraki

来源：

SOLID STATE IONICS | 1993年 / 66卷 / 1-2期

关键词：

D O I：

10.1016/0167-2738(93)90026-Y

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 oxygen permeation current density through La0.75Ca0.25CrO3-delta was calculated as a function of the oxygen partial pressure gradient using a random point defect model. The oxygen permeation current density depends on the oxygen partial pressure at the low oxygen partial pressure side as J(O2-) is-proportional-to P(O2)-0.5 when the nonstoichiometry of the perovskite at that side is small. The oxygen permeation current density is independent of the oxygen partial pressure at the high oxygen partial pressure side when the nonstoichiometry of the perovskite at that side is small in comparison with the nonstoichiometry at the low oxygen partial pressure side. The result of this calculation describes also the Electrochemical Vapor Deposition process of this type of perovskite material.

引用

页码：41 / 47

页数：7

共 22 条

[1]

Burggraaf A.J., 1991, SCI CERAMIC INTERFAC, P525

[2] ELECTRICAL-CONDUCTIVITY, SEEBECK COEFFICIENT AND DEFECT CHEMISTRY OF CA-DOPED YCRO3 [J].