Effect of aging on conductivity of yttria stabilized zirconia

被引：81
作者：
Hattori, M
Takeda, Y
Sakaki, Y
Nakanishi, A
Ohara, S
Mukai, K
Lee, JH
Fukui, T
机构：
[1] Mie Univ, Fac Engn, Tsu, Mie 5148507, Japan
[2] Chubu Elect Power Co Inc, Elect Power Res & Dev Ctr, Midori Ku, Nagoya, Aichi 4598522, Japan
[3] Japan Fine Ceram Ctr, Mat Res & Dev Lab, Atsuta Ku, Nagoya, Aichi 4568587, Japan
来源：
JOURNAL OF POWER SOURCES | 2004年 / 126卷 / 1-2期
关键词：
yuria stabilized zirconia; oxide ion conductivity; aging; Raman spectra; cubic phase; tetragonal phase;
D O I：
10.1016/j.jpowsour.2003.08.018
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：
The electrical conductivity change with annealing at 1000degreesC in the Y2O3-ZrO2 (YSZ) system was examined. Among the sintered samples doped with 8.0 mol% Y2O3 (8.0YSZ), 8.5 mol% Y2O3 (8.5YSZ), 9.0 mol% Y2O3 (9.0YSZ), 9.5 mol% Y2O3 (9.5YSZ) and 10.0 mol% Y2O3 (10.0YSZ), 9.5- and 10.0YSZ showed no conductivity decrease even for the annealing period of 1000 h, while 8.0- and 8.5YSZ showed significant decrease with time although the initial conductivities were higher than those of 9.5- and 10.0YSZ. The 9.0YSZ showed only slight conductivity decrease. The measurement of Raman spectra demonstrated that the deterioration in conductivity related to the gradual formation of fine tetragonal phase in the cubic phase. Consequently, 9.5YSZ was seemed to be optimum as the electrolyte material of solid oxide fuel cells from the point of stability in high conductivity. (C) 2003 Elsevier B.V. All rights reserved.
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页码：23 / 27
页数：5
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