期刊
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
卷 200, 期 1-3, 页码 199-204出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jmatprotec.2007.08.051
关键词
sintering; ZrO2; phase transformation; Ta2O5; particle size
The chemical stability and sinterability of nano- and micro-sized yttria stabilized zirconia (YSZ) powders were investigated, and the effect of Ta2O5 additive on the sinterability of YSZ electrolyte was also studied. Addition of Ta2O5 easily causes phase transformation of YSZ from cubic to monoclinic, and thus unfavorable for the improvement of ionic conductivity of YSZ electrolyte. Nano-sized YSZ easily causes abnormal grain growth and hence readily results in inhomogeneous microstructure of YSZ matrix, while micro-sized YSZ displays relatively low sinterability. Comparatively, mixture with 50 wt.% nano-sized and SO wt.% micro-sized YSZ powders exhibits high sinterability and could be sintered to homogeneous microstructure, which can be used as starting materials to prepare dense YSZ electrolyte at low temperatures. (c) 2007 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据