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Spinodal decomposition in lead-free piezoelectric BaTiO3–CaTiO3–BaZrO3 crystals

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorBUSE, Gabriel
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorXIN, Cong
hal.structure.identifierIRCER - Axe 3 : organisation structurale multiéchelle des matériaux [IRCER-AXE3]
dc.contributor.authorMARCHET, Pascal
hal.structure.identifierThales Research and Technology [Palaiseau]
dc.contributor.authorBORTA-BOYON, Ana
hal.structure.identifierThales Research and Technology [Palaiseau]
hal.structure.identifierCristallinov
dc.contributor.authorPHAM-THI, Maï
hal.structure.identifierCristallinov
dc.contributor.authorCABANE, Hughes
hal.structure.identifierConditions Extrêmes et Matériaux : Haute Température et Irradiation [CEMHTI]
dc.contributor.authorVÉRON, Emmanuel
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorJOSSE, Michaël
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorVELÁZQUEZ, Matias
hal.structure.identifierPlateforme Aquitaine de Caractérisation des Matériaux [PLACAMAT]
dc.contributor.authorLAHAYE, Michel
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorLEBRAUD, Éric
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMAGLIONE, Mario
hal.structure.identifierInstitut Lumière Matière [Villeurbanne] [ILM]
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorVEBER, Philippe
dc.date.issued2018-09-19
dc.identifier.issn1528-7483
dc.description.abstractEnPolycrystals and centimeter-sized BaTiO3-based single crystals were grown by top seeded solution growth from the BaTiO3–CaTiO3–BaZrO3 system. High effective partition coefficients of Zr ranging from 15 to 6 with small Zr content have been calculated from Castaing microprobe measurements, whereas those of Ca increase slightly from 0.45 to 0.7. A spinodal decomposition mechanism is emphasized during the growth leading to the emergence of two phases with close compositions. Chemical analysis displayed periodical Zr and Ca content fluctuations within the whole boules, and Rietveld measurements highlighted two phases belonging to perovskite structures with tetragonal P4mm and orthorhombic Amm2 space groups. Samples with various calcium and zirconium contents were characterized by means of dielectric and piezoelectric measurements. Most efficient samples are indistinctly polycrystals or oriented single crystals where electromechanical performances are compositional-dependent. Polycrystalline samples and single crystals oriented along (001)pc and (110)pc displayed Curie temperatures ranging from 50 to 111 °C. Electromechanical coupling factor up to 58% and piezoelectric charge coefficient d33 = 496 pC·N–1 were obtained at room temperature. The miscibility gap between the two perovskite solid solutions as well as Ca and Zr element content variation in single crystals lower crystal piezoelectric response that remains nonetheless of the same efficiency compared to that of ceramics of the same composition.
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.title.enSpinodal decomposition in lead-free piezoelectric BaTiO3–CaTiO3–BaZrO3 crystals
dc.typeArticle de revue
dc.identifier.doi10.1021/acs.cgd.8b00596
dc.subject.halChimie/Matériaux
bordeaux.journalCrystal Growth & Design
bordeaux.page5874-5884
bordeaux.volume18
bordeaux.issue10
bordeaux.peerReviewedoui
hal.identifierhal-01891394
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01891394v1
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