Processing and characterization of a Ni-Co ferrite for sensor applications

Detalhes bibliográficos
Autor(a) principal: Brito,V. L. O.
Data de Publicação: 2015
Outros Autores: Cunha,S. A., Araújo,F. F., Machado,J. P. B., Silva,M. R., Nunes,C. B.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Cerâmica (São Paulo. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132015000300341
Resumo: AbstractNi-Co ferrites are magnetostrictive ceramics that have potential application in magnetostrictive/ magnetoelastic sensors, as well as in magnetoelectric composites. Ni-rich Ni-Co spinel ferrite samples were processed by the ceramic method and bulk samples were sintered at 1350 ºC in the solid state and at 950 ºC with Bi2O3 liquid phase. The sintered samples were characterized by light microscopy, scanning electron microscopy, Raman spectroscopy, vibrating sample magnetometry and capacitance dilatometry. With Bi2O3 additions as small as 0.6 mol% it was possible to sinter the Ni-Co ferrite at 950 ºC, obtaining high-density samples; however, such liquid-phase sintered samples presented iron oxide particles. The studied samples presented magnetoelastic sensitivities very close to CoFe2O4, with significantly lower magnetic hysteresis. The results thus indicate that the magnetic properties of the samples analyzed are suitable for applications in magnetomechanical sensors.
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spelling Processing and characterization of a Ni-Co ferrite for sensor applicationsferritesmagnetoelastic sensorsmagnetostrictionmagnetic ceramicsAbstractNi-Co ferrites are magnetostrictive ceramics that have potential application in magnetostrictive/ magnetoelastic sensors, as well as in magnetoelectric composites. Ni-rich Ni-Co spinel ferrite samples were processed by the ceramic method and bulk samples were sintered at 1350 ºC in the solid state and at 950 ºC with Bi2O3 liquid phase. The sintered samples were characterized by light microscopy, scanning electron microscopy, Raman spectroscopy, vibrating sample magnetometry and capacitance dilatometry. With Bi2O3 additions as small as 0.6 mol% it was possible to sinter the Ni-Co ferrite at 950 ºC, obtaining high-density samples; however, such liquid-phase sintered samples presented iron oxide particles. The studied samples presented magnetoelastic sensitivities very close to CoFe2O4, with significantly lower magnetic hysteresis. The results thus indicate that the magnetic properties of the samples analyzed are suitable for applications in magnetomechanical sensors.Associação Brasileira de Cerâmica2015-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132015000300341Cerâmica v.61 n.359 2015reponame:Cerâmica (São Paulo. Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/0366-69132015613591893info:eu-repo/semantics/openAccessBrito,V. L. O.Cunha,S. A.Araújo,F. F.Machado,J. P. B.Silva,M. R.Nunes,C. B.eng2015-10-23T00:00:00Zoai:scielo:S0366-69132015000300341Revistahttps://www.scielo.br/j/ce/PUBhttps://old.scielo.br/oai/scielo-oai.phpceram.abc@gmail.com||ceram.abc@gmail.com1678-45530366-6913opendoar:2015-10-23T00:00Cerâmica (São Paulo. Online) - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv Processing and characterization of a Ni-Co ferrite for sensor applications
title Processing and characterization of a Ni-Co ferrite for sensor applications
spellingShingle Processing and characterization of a Ni-Co ferrite for sensor applications
Brito,V. L. O.
ferrites
magnetoelastic sensors
magnetostriction
magnetic ceramics
title_short Processing and characterization of a Ni-Co ferrite for sensor applications
title_full Processing and characterization of a Ni-Co ferrite for sensor applications
title_fullStr Processing and characterization of a Ni-Co ferrite for sensor applications
title_full_unstemmed Processing and characterization of a Ni-Co ferrite for sensor applications
title_sort Processing and characterization of a Ni-Co ferrite for sensor applications
author Brito,V. L. O.
author_facet Brito,V. L. O.
Cunha,S. A.
Araújo,F. F.
Machado,J. P. B.
Silva,M. R.
Nunes,C. B.
author_role author
author2 Cunha,S. A.
Araújo,F. F.
Machado,J. P. B.
Silva,M. R.
Nunes,C. B.
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Brito,V. L. O.
Cunha,S. A.
Araújo,F. F.
Machado,J. P. B.
Silva,M. R.
Nunes,C. B.
dc.subject.por.fl_str_mv ferrites
magnetoelastic sensors
magnetostriction
magnetic ceramics
topic ferrites
magnetoelastic sensors
magnetostriction
magnetic ceramics
description AbstractNi-Co ferrites are magnetostrictive ceramics that have potential application in magnetostrictive/ magnetoelastic sensors, as well as in magnetoelectric composites. Ni-rich Ni-Co spinel ferrite samples were processed by the ceramic method and bulk samples were sintered at 1350 ºC in the solid state and at 950 ºC with Bi2O3 liquid phase. The sintered samples were characterized by light microscopy, scanning electron microscopy, Raman spectroscopy, vibrating sample magnetometry and capacitance dilatometry. With Bi2O3 additions as small as 0.6 mol% it was possible to sinter the Ni-Co ferrite at 950 ºC, obtaining high-density samples; however, such liquid-phase sintered samples presented iron oxide particles. The studied samples presented magnetoelastic sensitivities very close to CoFe2O4, with significantly lower magnetic hysteresis. The results thus indicate that the magnetic properties of the samples analyzed are suitable for applications in magnetomechanical sensors.
publishDate 2015
dc.date.none.fl_str_mv 2015-09-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132015000300341
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132015000300341
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/0366-69132015613591893
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Associação Brasileira de Cerâmica
publisher.none.fl_str_mv Associação Brasileira de Cerâmica
dc.source.none.fl_str_mv Cerâmica v.61 n.359 2015
reponame:Cerâmica (São Paulo. Online)
instname:Universidade de São Paulo (USP)
instacron:USP
instname_str Universidade de São Paulo (USP)
instacron_str USP
institution USP
reponame_str Cerâmica (São Paulo. Online)
collection Cerâmica (São Paulo. Online)
repository.name.fl_str_mv Cerâmica (São Paulo. Online) - Universidade de São Paulo (USP)
repository.mail.fl_str_mv ceram.abc@gmail.com||ceram.abc@gmail.com
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