Hydrothermal synthesis and properties of Ce1-xGdxO2-δ solid solutions

被引:137
作者
Dikmen, S
Shuk, P
Greenblatt, M
Gocmez, H
机构
[1] Rutgers State Univ, Dept Chem, Piscataway, NJ 08854 USA
[2] Rutgers State Univ, Dept Ceram & Mat Engn, Piscataway, NJ 08854 USA
关键词
hydrothermal preparation; oxide ion conductors; cerium oxide; gadolinium oxide;
D O I
10.1016/S1293-2558(02)01301-8
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The structure, ionic and electronic conductivities of Ce1-xGdxO2-delta (x = 0-0.30) solid solutions, prepared in a wide substitutional range for the first time hydrothermally, were investigated. The uniformly small particle size (41-68 nm) of the hydrothermally prepared materials allows sintering of the samples into highly dense ceramic pellets at 1300-1400 degreesC, a significantly lower temperature than 1600-1650 degreesC, which is required for ceria solid electrolytes prepared by solid state techniques. The solubility limit of Gd2O3 in CeO2 was determined to be over 30 mol %. The maximum conductivity, sigma(600degreesC) similar to 7.53 x 10(-3) S cm(-1) with E-a = 0.58 eV, was found at x = 0.25. (C) 2002 Editions scientifiques et medicales Elsevier SAS. All rights reserved.
引用
收藏
页码:585 / 590
页数:6
相关论文
共 24 条
[1]   BISMUTH OXIDE-BASED SOLID ELECTROLYTES FOR FUEL-CELLS [J].
AZAD, AM ;
LAROSE, S ;
AKBAR, SA .
JOURNAL OF MATERIALS SCIENCE, 1994, 29 (16) :4135-4151
[2]  
Badwal SP, 1993, Science and technology of zirconia V, V1st
[3]   DOPANT ION RADIUS AND IONIC-CONDUCTIVITY IN CERIUM DIOXIDE [J].
BUTLER, V ;
CATLOW, CRA ;
FENDER, BEF ;
HARDING, JH .
SOLID STATE IONICS, 1983, 8 (02) :109-113
[4]   ELECTRICAL PROPERTIES OF SOLID OXIDE ELECTROLYTES [J].
ETSELL, TH ;
FLENGAS, SN .
CHEMICAL REVIEWS, 1970, 70 (03) :339-&
[5]  
Gopel W., 1991, CHEM BIOCH SENSORS, V2
[6]  
GOPEL W, 1991, CHEM BIOCH SENSORS, V3
[7]   Hydrothermal synthesis and properties of Ce1-xSmxO2-x/2 and Ce1-xCaxO2-x solid solutions [J].
Huang, W ;
Shuk, P ;
Greenblatt, M .
CHEMISTRY OF MATERIALS, 1997, 9 (10) :2240-2245
[8]  
HUANG W, 1998, SOLID STATE IONICS, V53, P113
[9]   Ceria-based solid electrolytes - Review [J].
Inaba, H ;
Tagawa, H .
SOLID STATE IONICS, 1996, 83 (1-2) :1-16
[10]  
Kilner J.A., 1981, NONSTOICIOMETRIC OXI, P233