Improvement of plasma-sprayed YSZ electrolytes for solid oxide fuel cells by alumina addition

被引：0
作者：
Amin Mirahmadi
Mohammad Pourmalek
机构：
[1] Iran University of Science and Technology (IUST),Manufacturing Engineering Group, Mechanical Engineering Department
来源：
Ionics | 2010年 / 16卷
关键词：
Plasma spray; Yttria-stabilized zirconia (YSZ); Ionic conductivity; Gas permeability; Alumina;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Atmospheric plasma spray is a fast and economical process for deposition of yttria-stabilized zirconia (YSZ) electrolyte for solid oxide fuel cells. YSZ powders have been used to prepare plasma-sprayed thin ceramic films on the metallic substrate employing plasma spray technology at atmospheric pressure. Alumina doping was employed to improve the structural characteristics and electrical properties of YSZ. The effect of alumina addition from 1 to 5 wt.% on the properties of plasma-sprayed YSZ films was investigated. It was found that the gas permeability of the Al-doped YSZ electrolyte layer reached a level of 8.6 × 10−7 cm4 gf−1 s−1, which is a necessary value for the practical operation of solid oxide fuel cells. Alumina doping considerably increased the ionic conductivity of plasma-sprayed YSZ. The open circuit voltage of the alumina-doped YSZ coating was approximately equal to the theoretical value for dense YSZ material.
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页码：447 / 453
页数：6
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