PROTON CONDUCTION IN LAYERED PEROVSKITE OXIDES

被引：27
|
作者：
THANGADURAI, V
SHUKLA, AK
GOPALAKRISHNAN, J
机构：
[1] Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore
来源：
SOLID STATE IONICS | 1994年 / 73卷 / 1-2期
关键词：
DEFECT CONDUCTIVITY; IONIC CONDUCTIVITY PROTON; PEROVSKITE; TITANIUM OXIDE;
D O I：
10.1016/0167-2738(94)90258-5
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：
Investigation of the electrical conductivity behavior of layered perovskite oxides, H2Ln2Ti3O10 (Ln = La, Nd, Sm and Gd), has revealed that the materials exhibit moderate conductivity (approximately 10(-5) OMEGA-1 cm-1 at 400-degrees-C) in hydrogen atmosphere, that is likely to be protonic in origin. It is suggested that the anion-deficient layered perovskite, Ln2Ti3O9 square, formed in situ by dehydration, may interact with water vapor in hydrogen atmosphere in a manner analogous to that of yttria-doped BaCeO3 and SrCeO3 giving rise to the protonic conductivity. HLa2Ti2NbO10 and HCa2Nb3O10 possessing a slightly different layered perovskite structure, exhibit a higher conductivity (approximately 10(-4)-10(-3) OMEGA-1 cm-1) under the same conditions.
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页码：9 / 14
页数：6
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