Hide metadata

dc.date.accessioned2020-08-27T10:55:42Z
dc.date.available2020-08-27T10:55:42Z
dc.date.created2020-06-30T13:37:15Z
dc.date.issued2020
dc.identifier.citationBondevik, Tarjei Polfus, Jonathan Marc Norby, Truls Eivind . Disagreements between space charge models and grain boundary impedance data in yttrium-substituted barium zirconate. Solid State Ionics. 2020, 353
dc.identifier.urihttp://hdl.handle.net/10852/78845
dc.description.abstractAlthough the space charge model is commonly used to explain the high grain boundary resistance in proton conducting yttrium-substituted BaZrO3, it fails in its simplest forms with factors 10–40 to fit experimental data with respect to the characteristic frequency of the grain boundary impedance. We suggest modifications to the model, somewhat improving its fit. Including trapping effects of protons near yttrium substituents reduces the error only by factors less than 1.6. Increasing the width of the grain boundary core reduces the error with factors of 1.5–3. Discretizing the space charge layer, such that protons can only reside on specific, discrete sites, reduces the error with another factor of around 2. Considering reduced proton mobility in the GB by reducing its effective area may give a reduction in the fitting error of a factor of 2. Varying the dielectric constant in the GB does not affect the error considerably. Neither each single modification, nor their combined effect, can, however, account for the majority of the discrepancy between the space charge model and experimental data.
dc.languageEN
dc.relation.ispartofBondevik, Tarjei (2019) Grain boundaries in a BaZrO3-based proton conductor: A theoretical and experimental study on atomic scale. Doctoral thesis http://urn.nb.no/URN:NBN:no-73799
dc.relation.urihttp://urn.nb.no/URN:NBN:no-73799
dc.rightsAttribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleDisagreements between space charge models and grain boundary impedance data in yttrium-substituted barium zirconate
dc.typeJournal article
dc.creator.authorBondevik, Tarjei
dc.creator.authorPolfus, Jonathan Marc
dc.creator.authorNorby, Truls Eivind
cristin.unitcode185,0,0,0
cristin.unitnameUniversitetet i Oslo
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1
dc.identifier.cristin1817836
dc.identifier.bibliographiccitationinfo:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Solid State Ionics&rft.volume=353&rft.spage=&rft.date=2020
dc.identifier.jtitleSolid State Ionics
dc.identifier.volume353
dc.identifier.pagecount0
dc.identifier.doihttps://doi.org/10.1016/j.ssi.2020.115369
dc.identifier.urnURN:NBN:no-81956
dc.type.documentTidsskriftartikkel
dc.type.peerreviewedPeer reviewed
dc.source.issn0167-2738
dc.identifier.fulltextFulltext https://www.duo.uio.no/bitstream/handle/10852/78845/2/1817836%2B1-s2.0-S016727381931001X-main.pdf
dc.type.versionPublishedVersion
cristin.articleid115369
dc.relation.projectNFR/228355


Files in this item

Appears in the following Collection

Hide metadata

Attribution 4.0 International
This item's license is: Attribution 4.0 International