ISIS Neutron and Muon Source Data Journal

Oxide ion vacancy distribution in A site substituted defect pyrochlores.

Abstract: Electrolytes based on pyrochlores such as Ln2M2O7 (M = Ti, Zr, Hf) have attracted attention due to their relative stability combined with relatively high ionic conductivity at intermediate temperatures, with a view to their use in solid oxide fuel cells. Subvalent substitution of the larger A site cation introduces oxide ion vacancies into the system with a consequent significant increase in oxide ion conductivity. Additionally dielectric permittivity measurements suggest subtle phase transitions at elevated temperatures are enhanced in the substituted systems. A variable temperature total neutron scattering study of oxide vacancy distribution in the system (Nd1-xCax)2Zr2O7-x is proposed, through a combined Reverse Monte Carlo analysis of neutron and X-ray scattering data. Details of the cation distribution will be examined through parallel measurements isotopically enriched 43Ca.

Principal Investigator: Dr Isaac Abrahams
Experimenter: Mr Ali Shehu
Experimenter: Dr Steve Hull
Experimenter: Professor Martin Dove
Experimenter: Dr Stefan Norberg
Experimenter: Dr Marcin Malys

DOI: 10.5286/ISIS.E.RB1510411

ISIS Experiment Number: RB1510411

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Dr Isaac Abrahams et al; (2015): Oxide ion vacancy distribution in A site substituted defect pyrochlores., STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1510411

Data is released under the CC-BY-4.0 license.