High temperature ionic conductivity in the trivalent ceramic electrolytes: LaAl11O18 and LaAl12O18N

被引：20

作者：

Warner, TE ^{[1
]}

Fray, DJ ^{[1
]}

Davies, A ^{[1
]}

机构：

[1] COOKSON TECHNOL CTR,OXFORD OX5 1PF,ENGLAND

来源：

SOLID STATE IONICS | 1996年 / 92卷 / 1-2期

关键词：

aluminium lanthanum nitride oxide; ionic conductivity; magnetoplumbite;

D O I：

10.1016/S0167-2738(96)00480-8

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：

LaAl11O18 and LaAl12O18N which adopt the magnetoplumbite type structure were prepared by high temperature sintering techniques from La2O3, alpha-Al2O3 and AlN powders. Phase purity was confirmed by powder XRD and IR spectroscopy. Impedance data for ceramic samples with Pt electrodes revealed an intra-granular ionic (La3+) conductivity with activation energies E(a)(LaAl11O18) = 2.5 eV and E(a)(LaAl12O18N) = 1.6 eV. At similar to 1540 K their conductivity is comparable to that for Sr-Li-beta-alumina with sigma similar to 3 X 10(-5) S cm(-1).

引用

页码：99 / 101

页数：3

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