Nanodomain formation and distribution in Gd-doped ceria

Li, Zhi-Peng, Mori, Toshiyuki, Auchterlonie, Graeme John, Zou, Jin and Drennan, John (2012) Nanodomain formation and distribution in Gd-doped ceria. Materials Research Bulletin, 47 3: 763-767. doi:10.1016/j.materresbull.2011.12.010


Author Li, Zhi-Peng
Mori, Toshiyuki
Auchterlonie, Graeme John
Zou, Jin
Drennan, John
Title Nanodomain formation and distribution in Gd-doped ceria
Journal name Materials Research Bulletin   Check publisher's open access policy
ISSN 0025-5408
1873-4227
Publication date 2012-03-01
Year available 2011
Sub-type Article (original research)
DOI 10.1016/j.materresbull.2011.12.010
Open Access Status Not Open Access
Volume 47
Issue 3
Start page 763
End page 767
Total pages 5
Place of publication Oxford, United Kingdom
Publisher Pergamon
Language eng
Abstract A comprehensive study, with a combination of diverse analytical techniques, was performed to investigate nanodomain formation and distribution in gadolinium-doped ceria. It is illustrated that the nanodomain formation, originating from the aggregation and segregation of dopant cations together with associated charge-compensating oxygen vacancies, is ubiquitous throughout doped ceria. The formation of nanodomains is not limited to bulk areas as previously reported but exists at grain boundaries as well. With enhanced ordering level, such nanodomains formed at grain boundaries will decrease the ionic conductivity as a result of hindered the mobility of oxygen vacancies in doped ceria. Particularly, the nanodomains formed at grain boundaries, with strong defect interactions due to enrichment of dopants and ordered oxygen vacancies, are suggested to be another possible reason for the grain-boundary resistance, other than the widely accepted space-charge layers.
Keyword Nanostructures
Electron Microscopy
Electron diffraction
Defects
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID 22310053
Institutional Status UQ
Additional Notes Available online 17 December 2011

 
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