CHARACTERIZATION OF GD, YB AND ND DOPED BARIUM CERATES AS PROTON CONDUCTORS

被引:135
作者
STEVENSON, DA
JIANG, N
BUCHANAN, RM
HENN, FEG
机构
[1] Department of Materials Science, Stanford University, Stanford
基金
美国国家科学基金会;
关键词
D O I
10.1016/0167-2738(93)90383-E
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
BaCeO3-based ceramics with Gd, Yb and Nd dopants were synthesized using conventional ceramic powder methods and were characterized by the following measurements: complex impedance to measure the bulk and grain boundary conductivity; the water uptake or loss in different environments; and the influence of normal and heavy water uptake on the conductivity of the samples. Conductivity and gravimetric measurements of all the samples show strong evidence of proton conduction, including a classical hydrogen/deuterium isotope effect. The influence of the gas ambient and the temperature on water uptake during annealing pretreatment is demonstrated and may be a significant factor in the discrepancies in the literature of these materials.
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页码:279 / 285
页数:7
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