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Microstructural and Chemical Characterization of Ordered Structure in Yttrium Doped Ceria

Published online by Cambridge University Press:  11 January 2013

Pengfei Yan*
Affiliation:
Global Research Center for Environmental and Energy based on Nanomaterials Science (GREEN), National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
Toshiyuki Mori
Affiliation:
Global Research Center for Environmental and Energy based on Nanomaterials Science (GREEN), National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
Yuanyuan Wu
Affiliation:
Global Research Center for Environmental and Energy based on Nanomaterials Science (GREEN), National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
Zhimin Li
Affiliation:
Global Research Center for Environmental and Energy based on Nanomaterials Science (GREEN), National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
Graeme John Auchterlonie
Affiliation:
Centre for Microscopy and Microanalysis, The University of Queensland, Brisbane, QLD 4072, Australia
Jin Zou
Affiliation:
Centre for Microscopy and Microanalysis, The University of Queensland, Brisbane, QLD 4072, Australia Materials Engineering, The University of Queensland, Brisbane, QLD 4072, Australia
John Drennan
Affiliation:
Centre for Microscopy and Microanalysis, The University of Queensland, Brisbane, QLD 4072, Australia
*
*Corresponding author. E-mail: [email protected]
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Abstract

The ordered structures in different doping levels (x = 0.1, 0.15, 0.2, 0.25, 0.3) of yttrium doped ceria (YDC, Ce(1−x)YxO2−δ) electrolytes were investigated by electron diffraction, high-resolution transmission electron microscopy (TEM), scanning TEM, and electron energy loss spectroscopy. Oxygen vacancy ordering was experimentally confirmed within the ordered structures. With increasing the doping level, the concentration of trivalent Ce cations was increased in YDC samples and such trivalent Ce cations were supposed to mainly exist in the ordered structures. Based on our electron microscopic observation and microanalysis, a crystal model for the ordered structures is proposed.

Type
Materials Applications
Copyright
Copyright © Microscopy Society of America 2013

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