Effect of annealing on the electrical conductivity of theY2O3-ZrO2 system

被引：37

作者：

Hattori, M ^{[1
]}

Takeda, Y

Lee, JH

Ohara, S

Mukai, K

Fukui, T

Takahashi, S

Sakaki, Y

Nakanishi, A

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, Nagoya, Aichi 4568587, Japan

来源：

JOURNAL OF POWER SOURCES | 2004年 / 131卷 / 1-2期

关键词：

YSZ; conductivity; high temperature; annealing; SOFC;

D O I：

10.1016/j.jpowsour.2003.11.084

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 effect of annealing on the electrical conductivity of the Y2O3-ZrO2 system (8.0-10.0 mol% Y2O3) was investigated by the direct current four-probe technique at several temperatures for 1000 h. The difference of the crystal structure before and after annealing was investigated by X-ray diffraction (XRD), Raman spectroscopy, and transmission electron microscopy (TEM). The decrease of the conductivity for the specimens with composition of 8.0-9.0 mol% Y2O3 was caused by the formation of a fine tetragonal phase. On the other hand, the sample of 9.5 mol% Y2O3 after annealing for 1000 h supported a single phase with cubic structure. Therefore, the optimum composition as electrolyte for solid oxide fuel cell in the Y2O3-ZrO2 system was considered to be 9.5 mol% Y2O3 from the viewpoint of long-term stability with the relatively high conductivity. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：247 / 250

页数：4