Neutron diffraction study of local and mesoscopic disorder induced by La and Yb double doping in Ce1-x-yLaxYbyO2-(x+y)/2, using PDF Analysis

DOI

The accurate determination of the defect structure of rare earth (RE) doped ceria solid electrolytes is fundamental for the comprehension of oxygen diffusion and charge transport within these materials. The mismatch between Ce4+ and RE3+ ionic radii is supposed to favour the oxygen vacancies and dopant ions clustering limiting the oxygen mobility. To minimize this effect it has been proposed to vary the ?average? ionic radius of RE by a mixture of large and small cation like e.g. La3+ and Yb3+.The aim of the experiment is to clarify the compositional evolution of defect clustering and the oxygen vacancies ordering in RE double-doped ceria. We propose to investigate the Ce1-x-yLaxYbyO2-(x+y)/2 solid solutions by means of PDF technique because it allows to unveil both the local (within few Å) and the mesoscopic (within few nm) disorder induced by doping in these solid solution.

Identifier
DOI https://doi.org/10.5286/ISIS.E.79113020
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/79113020
Provenance
Creator Dr Mauro Coduri; Dr Matthew Tucker; Professor David Keen; Mr Stefano Checchia; Dr Marco Scavini; Dr Michela Brunelli
Publisher ISIS Neutron and Muon Source
Publication Year 2019
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Representation
Resource Type Dataset
Discipline Chemistry; Natural Sciences
Temporal Coverage Begin 2016-04-25T23:00:00Z
Temporal Coverage End 2016-04-27T23:00:00Z