dc.contributor.author | Hasle, Ida | |
dc.contributor.author | Waldow, Stephan P. | |
dc.contributor.author | Gries, Ute N. | |
dc.contributor.author | De Souza, Roger A. | |
dc.contributor.author | Vøllestad, Einar | |
dc.contributor.author | Haugsrud, Reidar | |
dc.date.accessioned | 2022-05-09T08:17:28Z | |
dc.date.available | 2022-05-09T08:17:28Z | |
dc.date.created | 2021-09-27T12:30:56Z | |
dc.date.issued | 2021 | |
dc.identifier.issn | 2050-7488 | |
dc.identifier.uri | https://hdl.handle.net/11250/2994686 | |
dc.description.abstract | B-site cation inter-diffusion in the ABO3 perovskite yttrium-substituted barium zirconate (BZY) was studied at temperatures from 1100 to 1460 °C under reducing and oxidising conditions. The experiments followed two different approaches using Ce as a chemical tracer for Zr. By fitting diffusion profiles of the cation obtained by either Electron Probe Microanalysis (EPMA) or Time-of-Flight Secondary Ion Mass Spectrometry (ToF-SIMS), we determined bulk, grain-boundary and effective diffusion coefficients. The activation energies of bulk diffusion (4.5 ± 0.4 eV) are similar to the migration enthalpy obtained by a computational approach (∼4 eV). On this basis, we conclude that the activation energies correspond to the migration enthalpies, assuming that the concentration of Zr vacancies in the bulk was frozen-in. Grain-boundary diffusion coefficients were found to be more than four orders of magnitude higher than the corresponding bulk values, while the activation energies of grain-boundary diffusion are relatively similar to those for bulk. This was attributed to higher concentrations of cation vacancies in space-charge layers at the boundaries. Overall, the results show that BZY electrolytes are highly stable towards degradation related to B-site cation diffusion. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | Royal Society of Chemistry | en_US |
dc.relation.uri | https://app.cristin.no/projects/show.jsf?id=500756 | |
dc.rights | Navngivelse 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | * |
dc.subject | Diffusjon | en_US |
dc.subject | Diffusion | en_US |
dc.subject | Materialkjemi | en_US |
dc.subject | Materials chemistry | en_US |
dc.subject | Energimaterialer | en_US |
dc.subject | Energy Materials | en_US |
dc.title | B-site cation inter-diffusion in yttrium substituted barium zirconate | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | publishedVersion | en_US |
dc.subject.nsi | VDP::Uorganisk kjemi: 442 | en_US |
dc.subject.nsi | VDP::Inorganic chemistry: 442 | en_US |
dc.source.pagenumber | 21142-21150 | en_US |
dc.source.volume | 9 | en_US |
dc.source.journal | Journal of Materials Chemistry A | en_US |
dc.source.issue | 37 | en_US |
dc.identifier.doi | 10.1039/D1TA02391H | |
dc.identifier.cristin | 1939016 | |
dc.relation.project | Norges forskningsråd: 228355 | en_US |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |