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dc.contributor.authorPardo, Lorena-
dc.contributor.authorGarcía, Álvaro-
dc.contributor.authorBrebøl, Klaus-
dc.contributor.authorMercadelli, Elisa-
dc.contributor.authorGalassi, Carmen-
dc.date.accessioned2011-09-29T13:58:16Z-
dc.date.available2011-09-29T13:58:16Z-
dc.date.issued2011-09-29-
dc.identifier.issn0964-1726-
dc.identifier.urihttp://hdl.handle.net/10261/40316-
dc.description.abstractSubmicron-structured (Bi0.5Na0.5)0.94Ba0.06TiO3 (BNBT6) ceramics were obtained from nanometric powder synthesized by sol gel auto-combustion at 500ºC. Hot-pressing at low temperatures and a combination of this with re-crystallization, still moderate in order to reduce loss of the volatile elements, have been tested. Material properties, including all losses, were determined at the resonances of thin disks using Alemany et al. software. Ceramics hot pressed at 700-800ºC for 2h have a pseudo-cubic structure, grain size of few hundreds of nanometers and are homogeneous. Both their crystal structure and the lack of sintering prevent their poling. For ceramics hot-pressed at 950ºC for 3h, Bi or (Bi0.5Na0.5) loss, together with low piezoelectric properties (d33=60 pC.N-1, kp=8%), was observed. Re-crystallization at 1000ºC-1h of ceramics hot-pressed at 700 and 800ºC for 2h keeps submicron-structure, reduces porosity and prevents off-stoichiometry. Mechanical and piezoelectric losses are also reduced and coupling factors increased (kp=24.6%, kt=36.4%). The best piezoelectric coefficient obtained in these ceramics (d33=143 pC.N-1) is comparable with those reported for coarse-grained ceramicses_ES
dc.description.sponsorshipElectroceramics From Nanopowders (ELENA) COST539 Action (ESF) and European Network of Excellence on Multifunctional & Integrated piezoelectric Devices (NoE-MIND CE FP6 515757-2).es_ES
dc.language.isoenges_ES
dc.rightsopenAccesses_ES
dc.subjectPiezoelectrices_ES
dc.subjectPiezoelectricaes_ES
dc.subjectCeramices_ES
dc.subjectCerámicaes_ES
dc.subjectLead-freees_ES
dc.subjectVerdees_ES
dc.subjectMicrostructurees_ES
dc.subjectMicroestructuraes_ES
dc.subjectNanopowderes_ES
dc.subjectNanopartículaes_ES
dc.subjectFerroelectrices_ES
dc.subjectFerroeléctricaes_ES
dc.subjectDielectrices_ES
dc.subjectDieléctricaes_ES
dc.subjectStructurees_ES
dc.subjectEstructuraes_ES
dc.titlePiezoelectric properties of lead-free Submicron-structured (Bi0.5Na0.5)0.94Ba0.06TiO3 ceramics from nanopowderses_ES
dc.typeartículoes_ES
dc.description.peerreviewedPeer reviewedes_ES
dc.relation.publisherversionhttp://iopscience.iop.org/0964-1726/19/11/115007es_ES
dc.type.coarhttp://purl.org/coar/resource_type/c_6501es_ES
item.grantfulltextopen-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.openairetypeartículo-
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