Actions

Download Analytics Citations

Export to: EndNote  |  Zotero  |  Mendeley

Collections

This file is not currently in any collections.

Anisotropic Conductivity in Brownmillerite-Type Ca2Fe2O5 Observed by Measurements on Oriented Floating-Zone Grown Single Crystals [dataset] Open Access

Brownmillerite-type Ca2Fe2O5 is a mixed ionic and electronic conductor with applications as an electrode material for solid oxide fuel cells and solid oxide electrolyser cells. Long-range oxide ion migration in Ca2Fe2O5 has been computationally predicted to be predominantly two-dimensional, restricted to the (ac) crystallographic plane. We have used the floating zone method to grow large high-quality single crystals of Ca2Fe2O5 and measure its conductivity on two differently oriented single crystal samples in order to directly probe the anisotropy of transport properties. Impedance spectroscopy measurements have shown the conductivity in the (ac)-plane to be up to one and a half order of magnitude higher than that parallel to the crystallographic b-axis. This degree of anisotropy of the conductivity is higher than that observed experimentally in most other oxide ion or mixed conductors belonging to the apatite and melilite structural family, highlighting the suitability of brownmillerite-type materials for applications in devices requiring components in oriented crystal or thin-film forms.

Descriptions

Resource type

Dataset

Contributors

Creator: Curtis, Esther M. ¹
Auckett, Josie E. ²
Evans, Ivana R. ¹

¹ Durham University, UK
² Australia's Nuclear Science and Technology Organisation

Funder

Leverhulme Trust

Research methods

Other description

Keyword

Floating Zone Crystal Growth
Oxide Ion Conductors
Solid Oxide Fuel Cells
Brownmillerites

Subject

Crystal growth
Solid oxide fuel cells

Location

Language

Cited in

Identifier

ark:/32150/r2j9602067k
doi:10.15128/r2j9602067k

Rights

Creative Commons Attribution 4.0 International (CC BY)

Publisher

Durham University

Date Created

File Details

Depositor

E.M. Curtis

Date Uploaded

1 October 2025, 10:10:11

Date Modified

1 October 2025, 13:10:38

Audit Status

Audits have not yet been run on this file.

Characterization

File format: zip (ZIP Format)

Mime type: application/zip

File size: 1592161

Last modified: 2025:10:01 11:53:08+01:00

Filename: Ca2Fe2O5_Curtis_Auckett_Evans_Dataset.zip

Original checksum: 23bdaac6f083187f254102fb79b7b378