Compositional and structural characteristics of nano-sized domains in gadolinium-doped ceria

摘要：

Nano-sized domains were studied systematically in 10-30 at.% Gd-doped ceria. By using energy filtering transmission electron microscopy, it was observed that Gd cations could segregate in the domains. Due to the requirement of electrical neutrality, oxygen vacancies may also segregate into the domains with the dopant cations. Through study of electron energy loss spectroscopy, the local ordering of oxygen vacancies in the domains was further confirmed. Furthermore, the nano-sized domains and the local ordering develop with increasing doping concentration. Based on the experimental results, the formation mechanism of the domains and their effect on the ionic conductivity are discussed.

关键词： Ceria Microstructure Ordering of ozygen vacancies TEM

作者: Fei Ye Toshiyuki Mori Ding Rong Ou Jin Zou Graeme Auchterlonie John Drennan

作者单位: Fuel Cell Materials Center, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 3 School of Engineering, The University of Queensland, St.Lucia, Brisbane, Qld 4072, Australia Centre Centre for Microscopy and Microanalysis, The University of Queensland, St.Lucia, Brisbane, Qld 4072,

会议类型: 国际会议

会议名称: The 16th International Conference on Solid State Ionics(第十六届国际固态离子学会议)

会议地点: 上海

会议语种:英文

页码: 827-831

在线出版日期: 2007-07-01（万方平台首次上网日期，不代表论文的发表时间）