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Fast re-oxidation kinetics and conduction pathway in Spark Plasma Sintered ferroelectric ceramics

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorLEGALLAIS, M.
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorFOURCADE, Sébastien
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorCHUNG, U-Chan
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMICHAU, Dominique
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMAGLIONE, Mario
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMAUVY, Fabrice
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorELISSALDE, Catherine
dc.date.issued2018
dc.identifier.issn0955-2219
dc.description.abstractEnThe re-oxidation kinetics of BaTiO3 ceramics sintered by Spark Plasma Sintering (SPS) was investigated using in-situ impedance spectroscopy. Thanks to the flexibility of the SPS process, the grain size of the dense ceramics was tuned from 0.5 μm to 10 μm. The re-oxidation kinetics are found to be very fast regardless of the grain size and a full re-oxidation of the ceramics are achieved after 20 h of exposure to an ambient environment at only 600 °C. The residual density of charge carriers is reduced when using finer starting powders. SPS ceramics made with micrometer size grains demonstrate a residual charge-carrier density that is one tenth that of ceramics made from 10 μm particles. Grain-boundary conduction is dominant through fine-grain SPS ceramics. This latter feature is similar to BaTiO3 sintered using the conventional route with 10 μm size grain. Finally, the critical grain size for optimal dielectric permittivity is found to shift from 0.7 μm in standard ceramics to 1.5 μm in SPS ceramics.
dc.language.isoen
dc.publisherElsevier
dc.subject.enDielectric properties
dc.subject.enOxidation process
dc.subject.enImpedance spectroscopy
dc.subject.enBaTiO3
dc.subject.enSPS
dc.subject.endielectric properties
dc.subject.enImpedance Spectroscopy
dc.subject.enoxidation process
dc.title.enFast re-oxidation kinetics and conduction pathway in Spark Plasma Sintered ferroelectric ceramics
dc.typeArticle de revue
dc.identifier.doi10.1016/j.jeurceramsoc.2017.07.026
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of the European Ceramic Society
bordeaux.page543-550
bordeaux.volume38
bordeaux.issue2
bordeaux.peerReviewedoui
hal.identifierhal-01640509
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01640509v1
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