Electrical conductivity and defect equilibria of Pr0.1Ce0.9O2-δ

被引：150

作者：

Bishop, Sean R. ^{[1
]}

Stefanik, Todd S. ^{[1
]}

Tuller, Harry L. ^{[1
]}

机构：

[1] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2011年 / 13卷 / 21期

基金：

美国国家科学基金会;

关键词：

CEO2; SINGLE-CRYSTALS; DOPED CERIUM OXIDE; OXYGEN NONSTOICHIOMETRY; SOLID ELECTROLYTES; CHEMICAL EXPANSION; THERMAL-EXPANSION; MIXED CONDUCTORS; THIN-FILMS; TRANSPORT; CHEMISTRY;

D O I：

10.1039/c0cp02920c

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：

Praseodymium-cerium oxide (PCO) solid solutions exhibit mixed ionic electronic conductivity (MIEC) behavior in a relatively high and readily accessible oxygen partial pressure (PO2) regime and as such serve as a model system for investigating the correlation between thermodynamic and kinetic properties and performance figures of merit in the areas of high temperature energy conversion, automotive control, and gas sensing applications. In this paper, we present measurements on the non-stoichiometry of Pr0.1Ce0.9O2-delta and develop a defect equilibria model to predict the dependence of the concentration of all the dominant charge carriers on temperature, PO2, and Pr fraction. The predictive model is then employed to describe the measured electrical conductivity and oxygen nonstoichiometry whereby pre-exponentials and enthalpies of defect formation and migration are extracted.

引用

页码：10165 / 10173

页数：9

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