Grain growth control in Nb-doped BaTiO3

Autores
Brzozowski, E.; Castro, Miriam Susana
Año de publicación
2005
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In this work, the grain growth inhibition effect of Nb2O5 on BaTiO3 was improved by employing selected raw materials and an advanced milling technique. BaTiO3 prepared from crystalline TiO2 powder and needle-shaped BaCO3 led to large grains on sintering, in addition to second phases due to Ti segregation and non-complete Nb incorporation. These phases did not inhibit grain growth but they affected the permittivity–temperature dependence of the material. In these materials, compensation charge mechanisms by electrons provided semiconducting characteristics at room temperature. Further modifications on materials selection and ceramic processing varied the Nb incorporation extent significantly. Mechanochemically activated BaCO3 reactant and ultrafine TiO2 led to an early reaction. It provided a wide temperature range for Nb5+ incorporation as the BaCO3–TiO2 reaction progressed. Complete, homogeneous Nb incorporation in these materials allowed a strong grain growth inhibition on sintering and avoided accumulation of needle-shaped phases. Simultaneously to the grain growth inhibition phenomenon a considerable increase in titanium vacancy concentration was detected. Resulting materials stabilized in a pseudocubic phase and showed high dielectric features at room temperature.
Fil: Brzozowski, E.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina
Fil: Castro, Miriam Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina
Materia
Powders–Solid State Reaction
Defects
Microstructure
Dielectric Properties
Batio3 And Titanates
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/28058
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/28058
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Grain growth control in Nb-doped BaTiO3Brzozowski, E.Castro, Miriam SusanaPowders–Solid State ReactionDefectsMicrostructureDielectric PropertiesBatio3 And Titanateshttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2https://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1In this work, the grain growth inhibition effect of Nb2O5 on BaTiO3 was improved by employing selected raw materials and an advanced milling technique. BaTiO3 prepared from crystalline TiO2 powder and needle-shaped BaCO3 led to large grains on sintering, in addition to second phases due to Ti segregation and non-complete Nb incorporation. These phases did not inhibit grain growth but they affected the permittivity–temperature dependence of the material. In these materials, compensation charge mechanisms by electrons provided semiconducting characteristics at room temperature. Further modifications on materials selection and ceramic processing varied the Nb incorporation extent significantly. Mechanochemically activated BaCO3 reactant and ultrafine TiO2 led to an early reaction. It provided a wide temperature range for Nb5+ incorporation as the BaCO3–TiO2 reaction progressed. Complete, homogeneous Nb incorporation in these materials allowed a strong grain growth inhibition on sintering and avoided accumulation of needle-shaped phases. Simultaneously to the grain growth inhibition phenomenon a considerable increase in titanium vacancy concentration was detected. Resulting materials stabilized in a pseudocubic phase and showed high dielectric features at room temperature.Fil: Brzozowski, E.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; ArgentinaFil: Castro, Miriam Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; ArgentinaElsevier2005-03-28info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/28058Brzozowski, E.; Castro, Miriam Susana; Grain growth control in Nb-doped BaTiO3; Elsevier; Journal Of Materials Processing Technology; 168; 3; 28-3-2005; 464-4700924-0136CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0924013605003195info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jmatprotec.2005.02.246info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:55:11Zoai:ri.conicet.gov.ar:11336/28058instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:55:12.043CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Grain growth control in Nb-doped BaTiO3
title Grain growth control in Nb-doped BaTiO3
spellingShingle Grain growth control in Nb-doped BaTiO3
Brzozowski, E.
Powders–Solid State Reaction
Defects
Microstructure
Dielectric Properties
Batio3 And Titanates
title_short Grain growth control in Nb-doped BaTiO3
title_full Grain growth control in Nb-doped BaTiO3
title_fullStr Grain growth control in Nb-doped BaTiO3
title_full_unstemmed Grain growth control in Nb-doped BaTiO3
title_sort Grain growth control in Nb-doped BaTiO3
dc.creator.none.fl_str_mv Brzozowski, E.
Castro, Miriam Susana
author Brzozowski, E.
author_facet Brzozowski, E.
Castro, Miriam Susana
author_role author
author2 Castro, Miriam Susana
author2_role author
dc.subject.none.fl_str_mv Powders–Solid State Reaction
Defects
Microstructure
Dielectric Properties
Batio3 And Titanates
topic Powders–Solid State Reaction
Defects
Microstructure
Dielectric Properties
Batio3 And Titanates
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv In this work, the grain growth inhibition effect of Nb2O5 on BaTiO3 was improved by employing selected raw materials and an advanced milling technique. BaTiO3 prepared from crystalline TiO2 powder and needle-shaped BaCO3 led to large grains on sintering, in addition to second phases due to Ti segregation and non-complete Nb incorporation. These phases did not inhibit grain growth but they affected the permittivity–temperature dependence of the material. In these materials, compensation charge mechanisms by electrons provided semiconducting characteristics at room temperature. Further modifications on materials selection and ceramic processing varied the Nb incorporation extent significantly. Mechanochemically activated BaCO3 reactant and ultrafine TiO2 led to an early reaction. It provided a wide temperature range for Nb5+ incorporation as the BaCO3–TiO2 reaction progressed. Complete, homogeneous Nb incorporation in these materials allowed a strong grain growth inhibition on sintering and avoided accumulation of needle-shaped phases. Simultaneously to the grain growth inhibition phenomenon a considerable increase in titanium vacancy concentration was detected. Resulting materials stabilized in a pseudocubic phase and showed high dielectric features at room temperature.
Fil: Brzozowski, E.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina
Fil: Castro, Miriam Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina
description In this work, the grain growth inhibition effect of Nb2O5 on BaTiO3 was improved by employing selected raw materials and an advanced milling technique. BaTiO3 prepared from crystalline TiO2 powder and needle-shaped BaCO3 led to large grains on sintering, in addition to second phases due to Ti segregation and non-complete Nb incorporation. These phases did not inhibit grain growth but they affected the permittivity–temperature dependence of the material. In these materials, compensation charge mechanisms by electrons provided semiconducting characteristics at room temperature. Further modifications on materials selection and ceramic processing varied the Nb incorporation extent significantly. Mechanochemically activated BaCO3 reactant and ultrafine TiO2 led to an early reaction. It provided a wide temperature range for Nb5+ incorporation as the BaCO3–TiO2 reaction progressed. Complete, homogeneous Nb incorporation in these materials allowed a strong grain growth inhibition on sintering and avoided accumulation of needle-shaped phases. Simultaneously to the grain growth inhibition phenomenon a considerable increase in titanium vacancy concentration was detected. Resulting materials stabilized in a pseudocubic phase and showed high dielectric features at room temperature.
publishDate 2005
dc.date.none.fl_str_mv 2005-03-28
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/28058
Brzozowski, E.; Castro, Miriam Susana; Grain growth control in Nb-doped BaTiO3; Elsevier; Journal Of Materials Processing Technology; 168; 3; 28-3-2005; 464-470
0924-0136
CONICET Digital
CONICET
url http://hdl.handle.net/11336/28058
identifier_str_mv Brzozowski, E.; Castro, Miriam Susana; Grain growth control in Nb-doped BaTiO3; Elsevier; Journal Of Materials Processing Technology; 168; 3; 28-3-2005; 464-470
0924-0136
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0924013605003195
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jmatprotec.2005.02.246
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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