THE INCORPORATION AND MIGRATION OF PROTONS IN ND-DOPED BACEO3

被引：146

作者：

LIU, JF

NOWICK, AS

机构：

[1] Henry Krumb School of Mines, Columbia University, New York

来源：

SOLID STATE IONICS | 1992年 / 50卷 / 1-2期

关键词：

D O I：

10.1016/0167-2738(92)90045-Q

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：

A detailed study of protonic conductivity in Nd-doped BaCeO3 is made using water-uptake and galvanic-cell measurements to supplement the conductivity results. Samples were pretreated at 900-degrees-C at different P(H2O) atmospheres and the conductivity measured with a frozen-in proton concentration. Isotope effect (D2O versus H2O) measurements were also made. The results show that interstitial protons enter the lattice as compensators for the dopant, replacing oxygen-ion vacancies, and migrate by hopping between adjacent O2- ions with a low migration energy of 0.54 eV. Comparison with other acceptor-doped perovskite oxides is made in order to better understand the origin of the high protonic conductivity in this material.

引用

页码：131 / 138

页数：8

共 17 条

[1] IONIC-CONDUCTIVITY OF GADOLINIUM-DOPED BARIUM CERATE PEROVSKITES [J].