dc.date.accessioned | 2021-10-01T15:55:10Z | |
dc.date.available | 2021-10-01T15:55:10Z | |
dc.date.created | 2021-09-27T12:30:56Z | |
dc.date.issued | 2021 | |
dc.identifier.citation | Hasle, Ida Waldow, Stephan P. Gries, Ute N. De Souza, Roger A. Vøllestad, Einar Haugsrud, Reidar . B-site cation inter-diffusion in yttrium substituted barium zirconate. Journal of Materials Chemistry A. 2021 | |
dc.identifier.uri | http://hdl.handle.net/10852/88702 | |
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. | |
dc.language | EN | |
dc.rights | Attribution 3.0 Unported | |
dc.rights.uri | https://creativecommons.org/licenses/by/3.0/ | |
dc.title | B-site cation inter-diffusion in yttrium substituted barium zirconate | |
dc.type | Journal article | |
dc.creator.author | Hasle, Ida | |
dc.creator.author | Waldow, Stephan P. | |
dc.creator.author | Gries, Ute N. | |
dc.creator.author | De Souza, Roger A. | |
dc.creator.author | Vøllestad, Einar | |
dc.creator.author | Haugsrud, Reidar | |
cristin.unitcode | 185,15,12,52 | |
cristin.unitname | Faststoff elektrokjemi | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |
dc.identifier.cristin | 1939016 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal of Materials Chemistry A&rft.volume=&rft.spage=&rft.date=2021 | |
dc.identifier.jtitle | Journal of Materials Chemistry A | |
dc.identifier.doi | https://doi.org/10.1039/D1TA02391H | |
dc.identifier.urn | URN:NBN:no-91316 | |
dc.subject.nvi | VDP::Uorganisk kjemi: 442 | |
dc.type.document | Tidsskriftartikkel | |
dc.type.peerreviewed | Peer reviewed | |
dc.source.issn | 2050-7488 | |
dc.identifier.fulltext | Fulltext https://www.duo.uio.no/bitstream/handle/10852/88702/2/Hasle_cation_diffusion_in_BZY.pdf | |
dc.type.version | PublishedVersion | |
dc.relation.project | NFR/228355 | |