Piezoelectric properties of lead-free Submicron-structured (Bi0.5Na0.5)0.94Ba0.06TiO3 ceramics from nanopowders

Submicron-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,...

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Detalhes bibliográficos
Autores: Pardo, Lorena, García, Álvaro, Brebøl, Klaus, Mercadelli, Elisa, Galassi, Carmen
Formato: artículo
Fecha de publicación:2011
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/40316
Acesso em linha:http://hdl.handle.net/10261/40316
Access Level:acceso abierto
Palavra-chave:Piezoelectric
Piezoelectrica
Ceramic
Cerámica
Lead-free
Verde
Microstructure
Microestructura
Nanopowder
Nanopartícula
Ferroelectric
Ferroeléctrica
Dielectric
Dieléctrica
Structure
Estructura
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spelling Piezoelectric properties of lead-free Submicron-structured (Bi0.5Na0.5)0.94Ba0.06TiO3 ceramics from nanopowdersPardo, LorenaGarcía, ÁlvaroBrebøl, KlausMercadelli, ElisaGalassi, CarmenPiezoelectricPiezoelectricaCeramicCerámicaLead-freeVerdeMicrostructureMicroestructuraNanopowderNanopartículaFerroelectricFerroeléctricaDielectricDieléctricaStructureEstructuraSubmicron-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 ceramicsElectroceramics From Nanopowders (ELENA) COST539 Action (ESF) and European Network of Excellence on Multifunctional & Integrated piezoelectric Devices (NoE-MIND CE FP6 515757-2).Peer reviewed201120112011info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/40316reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://iopscience.iop.org/0964-1726/19/11/115007info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/403162026-05-22T06:33:51Z
dc.title.none.fl_str_mv Piezoelectric properties of lead-free Submicron-structured (Bi0.5Na0.5)0.94Ba0.06TiO3 ceramics from nanopowders
title Piezoelectric properties of lead-free Submicron-structured (Bi0.5Na0.5)0.94Ba0.06TiO3 ceramics from nanopowders
spellingShingle Piezoelectric properties of lead-free Submicron-structured (Bi0.5Na0.5)0.94Ba0.06TiO3 ceramics from nanopowders
Pardo, Lorena
Piezoelectric
Piezoelectrica
Ceramic
Cerámica
Lead-free
Verde
Microstructure
Microestructura
Nanopowder
Nanopartícula
Ferroelectric
Ferroeléctrica
Dielectric
Dieléctrica
Structure
Estructura
title_short Piezoelectric properties of lead-free Submicron-structured (Bi0.5Na0.5)0.94Ba0.06TiO3 ceramics from nanopowders
title_full Piezoelectric properties of lead-free Submicron-structured (Bi0.5Na0.5)0.94Ba0.06TiO3 ceramics from nanopowders
title_fullStr Piezoelectric properties of lead-free Submicron-structured (Bi0.5Na0.5)0.94Ba0.06TiO3 ceramics from nanopowders
title_full_unstemmed Piezoelectric properties of lead-free Submicron-structured (Bi0.5Na0.5)0.94Ba0.06TiO3 ceramics from nanopowders
title_sort Piezoelectric properties of lead-free Submicron-structured (Bi0.5Na0.5)0.94Ba0.06TiO3 ceramics from nanopowders
dc.creator.none.fl_str_mv Pardo, Lorena
García, Álvaro
Brebøl, Klaus
Mercadelli, Elisa
Galassi, Carmen
author Pardo, Lorena
author_facet Pardo, Lorena
García, Álvaro
Brebøl, Klaus
Mercadelli, Elisa
Galassi, Carmen
author_role author
author2 García, Álvaro
Brebøl, Klaus
Mercadelli, Elisa
Galassi, Carmen
author2_role author
author
author
author
dc.subject.none.fl_str_mv Piezoelectric
Piezoelectrica
Ceramic
Cerámica
Lead-free
Verde
Microstructure
Microestructura
Nanopowder
Nanopartícula
Ferroelectric
Ferroeléctrica
Dielectric
Dieléctrica
Structure
Estructura
topic Piezoelectric
Piezoelectrica
Ceramic
Cerámica
Lead-free
Verde
Microstructure
Microestructura
Nanopowder
Nanopartícula
Ferroelectric
Ferroeléctrica
Dielectric
Dieléctrica
Structure
Estructura
description Submicron-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 ceramics
publishDate 2011
dc.date.none.fl_str_mv 2011
2011
2011
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/40316
url http://hdl.handle.net/10261/40316
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://iopscience.iop.org/0964-1726/19/11/115007
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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