LATTICE-PARAMETERS AND DENSITIES OF RARE-EARTH-OXIDE DOPED CERIA ELECTROLYTES

被引:308
作者
HONG, SJ
VIRKAR, AV
机构
[1] Department of Materials Science and Engineering, University of Utah, Salt Lake, Utah
关键词
D O I
10.1111/j.1151-2916.1995.tb08820.x
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Lattice parameters and densities of various rare-earth oxide doped ceria were measured. For the calculation of lattice parameters, the concept of the oxygen vacancy radius was introduced. The estimated oxygen vacancy radius was 1.164 Angstrom A for trivalent, rare-earth oxide doped ceria and 0.993 Angstrom A for zirconia. The modeling of the lattice parameter and density based on the oxygen vacancy radius generally agreed with experimental results. The density measurements illustrate that oxygen vacancy formation is the predominant defect reaction. Evidence of some interstitial contribution was also noted for smaller-sized dopant cations such as Yb3+ and Er3+.
引用
收藏
页码:433 / 439
页数:7
相关论文
共 16 条
[1]   EXAFS STUDY OF YTTRIA-STABILIZED ZIRCONIA [J].
CATLOW, CRA ;
CHADWICK, AV ;
GREAVES, GN ;
MORONEY, LM .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1986, 69 (03) :272-277
[2]  
CHANDRA S, 1981, SUPERIONIC SOLIDS PR, P101
[3]   IONIC-CONDUCTIVITY OF CALCIA, YTTRIA, AND RARE EARTH DOPED CERIUM DIOXIDE [J].
DIRSTINE, RT ;
BLUMENTHAL, RN ;
KUECH, TF .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1979, 126 (02) :264-269
[4]   ELECTRICAL PROPERTIES OF SOLID OXIDE ELECTROLYTES [J].
ETSELL, TH ;
FLENGAS, SN .
CHEMICAL REVIEWS, 1970, 70 (03) :339-&
[5]   PHASE-STABILITY, PHASE-TRANSFORMATION KINETICS, AND CONDUCTIVITY OF Y2O3-BI2O3 SOLID ELECTROLYTES CONTAINING ALIOVALENT DOPANTS [J].
FUNG, KZ ;
VIRKAR, AV .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1991, 74 (08) :1970-1980
[6]  
Glushkova V. B., 1978, Ceramurgia International, V4, P176, DOI 10.1016/0390-5519(78)90033-9
[7]   LATTICE-PARAMETERS, IONIC CONDUCTIVITIES, AND SOLUBILITY LIMITS IN FLUORITE-STRUCTURE HF-4+O2, ZR-4+O2, CE-4+O2, TH-4+O2, V-4+O2 OXIDE SOLID-SOLUTIONS [J].
KIM, DJ .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1989, 72 (08) :1415-1421
[8]   OXYGEN ION CONDUCTION OF FLUORITE-TYPE CE1-XLNXO2-X-2 (LN= LANTHANOID ELEMENT) [J].
KUDO, T ;
OBAYASHI, H .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1975, 122 (01) :142-147
[9]  
Maki Y., 1971, U.S. Patent, Patent No. [3,607,424, 3607424]
[10]   ENHANCED CERIA - A LOW-TEMPERATURE SOFC ELECTROLYTE [J].
MARICLE, DL ;
SWARR, TE ;
KARAVOLIS, S .
SOLID STATE IONICS, 1992, 52 (1-3) :173-182