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http://hdl.handle.net/10773/20501
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DC Field | Value | Language |
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dc.contributor.author | Shalaeva, E. V. | pt |
dc.contributor.author | Patrakeev, M. V. | pt |
dc.contributor.author | Markov, A. A. | pt |
dc.contributor.author | Tyutyunnik, A. P. | pt |
dc.contributor.author | Murzakaev, A. M. | pt |
dc.contributor.author | Kharton, V. V. | pt |
dc.contributor.author | Tsipis, E. V. | pt |
dc.contributor.author | Waerenborgh, J. C. | pt |
dc.contributor.author | Leonidov, I. A. | pt |
dc.contributor.author | Kozhevnikov, V. L. | pt |
dc.date.accessioned | 2017-12-07T19:49:15Z | - |
dc.date.issued | 2015 | pt |
dc.identifier.issn | 1432-8488 | pt |
dc.identifier.uri | http://hdl.handle.net/10773/20501 | - |
dc.description.abstract | The incorporation of tantalum cations in mixed-conducting SrFe1-xTaxO3-delta (x = 0.03 -aEuro parts per thousand 0.10) results in the formation of single cubic perovskite-like phases in oxidizing atmospheres while under reducing conditions phase separation is observed, accompanied with an appearance of brownmillerite-type nanodomains on the background of the perovskite-like matrix. For SrFe0.97Ta0.03O3-delta after reduction, the x-ray and electron diffraction studies combined with transmission electron microscopy evidence the formation of approximately 30 vol.% brownmillerite phase with an average domain size of 20-40 nm. The oxygen partial pressure dependencies of the total conductivity in the range from 10(-20) to 0.5 atm at 700-950 A degrees C show that the electron transport parameters remain virtually independent on the dopant content and domain structure. Contrary to the materials with higher dopant content, however, the ion conduction in SrFe0.97Ta0.03O3-delta tends to substantially increase on redox cycling. This behavior was attributed to the brownmillerite domain disintegration and rearrangement, induced by cyclic formation and disappearance of oxygen vacancies. | pt |
dc.language.iso | eng | pt |
dc.publisher | SPRINGER | pt |
dc.relation | info:eu-repo/grantAgreement/FCT/5876-PPCDTI/114561/PT | pt |
dc.relation | info:eu-repo/grantAgreement/FCT/5876/147332/PT | pt |
dc.rights | restrictedAccess | por |
dc.subject | CALCIUM LANTHANUM FERRITES | pt |
dc.subject | MIXED CONDUCTIVITY | pt |
dc.subject | TEMPERATURE | pt |
dc.subject | CAXLA1-XFEO3-Y | pt |
dc.title | Ion transport in dual-phase SrFe1-xD cent D degrees O-x(3-delta) (x=0.03-aEuro parts per thousand 0.10): effects of redox cycling | pt |
dc.type | article | pt |
dc.peerreviewed | yes | pt |
ua.distribution | international | pt |
degois.publication.firstPage | 841 | pt |
degois.publication.issue | 3 | pt |
degois.publication.lastPage | 849 | pt |
degois.publication.title | JOURNAL OF SOLID STATE ELECTROCHEMISTRY | pt |
degois.publication.volume | 19 | pt |
dc.date.embargo | 10000-01-01 | - |
dc.relation.publisherversion | 10.1007/s10008-014-2698-2 | pt |
dc.identifier.doi | 10.1007/s10008-014-2698-2 | pt |
Appears in Collections: | CICECO - Artigos |
Files in This Item:
File | Description | Size | Format | |
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Ion transport in dual-phase SrFe1-xD cent D degrees O-x(3-delta) (x=0.03-aEuro parts per thousand 0.10) effects of redox cycling_10.1007s10008-014-2698-2.pdf | 1.29 MB | Adobe PDF |
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