Dielectric properties of La3+ doped Sr0.3-3y/2LayBa0.7Nb2O6 ceramics prepared under different sintering conditions

A study of the dielectric properties of the Lanthanum doped Sr0.3Ba0.7Nb2O6 (SBN30) ceramic according to the stoichiometric formulation Sr0.3-3y/2LayBa0.7Nb2O6 with y = 0.01, 0.03 and 0.05, and the influence of the sintering conditions is reported. The XRD shows single phase compounds for Sr0.285La0...

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Detalles Bibliográficos
Autores: Guerrero, F, Amorin, H, Portelles, JJ, Fundora, A, Siqueiros, JM, Hirata, GA, Aguilera, S
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:1999
País:México
Institución:Universidad Nacional Autónoma de México
Repositorio:Sistema de Información de la Facultad de Ciencias, UNAM
OAI Identifier:oai:repositorio.fciencias.unam.mx:11154/3287
Acceso en línea:http://hdl.handle.net/11154/3287
Access Level:acceso abierto
Palabra clave:Materials Science, Ceramics
ferroelectric ceramics
dielectric properties
microstructure
densification
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spelling Dielectric properties of La3+ doped Sr0.3-3y/2LayBa0.7Nb2O6 ceramics prepared under different sintering conditionsGuerrero, FAmorin, HPortelles, JJFundora, ASiqueiros, JMHirata, GAAguilera, SMaterials Science, Ceramicsferroelectric ceramicsdielectric propertiesmicrostructuredensificationA study of the dielectric properties of the Lanthanum doped Sr0.3Ba0.7Nb2O6 (SBN30) ceramic according to the stoichiometric formulation Sr0.3-3y/2LayBa0.7Nb2O6 with y = 0.01, 0.03 and 0.05, and the influence of the sintering conditions is reported. The XRD shows single phase compounds for Sr0.285La0.01Ba0.7Nb2O6 (LSBN1) and Sr0.255La0.03Ba0.7Nb2O6 (LSBN3) ceramics, both samples having similar microstructure, densification and dielectric properties. The density increases linearly with ln t, where t is the sintering time, and the values of the maximum ferroelectric peaks of the permittivity increase steadily with t. Using the Bruggeman model to estimate the theoretical permittivity, it is concluded that the magnitude of the experimental permittivity peaks are mainly affected by the volume fraction of porosity of the samples. In this study we also establish that pore diffusion mechanisms behave according to the Ginstling-Brownshtein equation. For the Sr0.225La0.05Ba0.7Nb2O6 (LSBN5) sample, XRD analysis reveals the presence of isostructural compounds of the intermediate phases BaNb2O6 and SrNb2O6, and the dielectric properties start to deteriorate. This fact indicates the existence of a solubility limit of Lanthanum ions in the SBN solid solution.2011-01-22T10:27:37Z2011-01-22T10:27:37Z1999info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1385-3449http://hdl.handle.net/11154/328726033(4):377-385reponame:Sistema de Información de la Facultad de Ciencias, UNAMinstname:Universidad Nacional Autónoma de Méxicoinstacron:UNAMenJournal of Electroceramicsinfo:eu-repo/semantics/openAccessoai:repositorio.fciencias.unam.mx:11154/32872025-09-17T19:21:38Z
dc.title.none.fl_str_mv Dielectric properties of La3+ doped Sr0.3-3y/2LayBa0.7Nb2O6 ceramics prepared under different sintering conditions
title Dielectric properties of La3+ doped Sr0.3-3y/2LayBa0.7Nb2O6 ceramics prepared under different sintering conditions
spellingShingle Dielectric properties of La3+ doped Sr0.3-3y/2LayBa0.7Nb2O6 ceramics prepared under different sintering conditions
Guerrero, F
Materials Science, Ceramics
ferroelectric ceramics
dielectric properties
microstructure
densification
title_short Dielectric properties of La3+ doped Sr0.3-3y/2LayBa0.7Nb2O6 ceramics prepared under different sintering conditions
title_full Dielectric properties of La3+ doped Sr0.3-3y/2LayBa0.7Nb2O6 ceramics prepared under different sintering conditions
title_fullStr Dielectric properties of La3+ doped Sr0.3-3y/2LayBa0.7Nb2O6 ceramics prepared under different sintering conditions
title_full_unstemmed Dielectric properties of La3+ doped Sr0.3-3y/2LayBa0.7Nb2O6 ceramics prepared under different sintering conditions
title_sort Dielectric properties of La3+ doped Sr0.3-3y/2LayBa0.7Nb2O6 ceramics prepared under different sintering conditions
dc.creator.none.fl_str_mv Guerrero, F
Amorin, H
Portelles, JJ
Fundora, A
Siqueiros, JM
Hirata, GA
Aguilera, S
author Guerrero, F
author_facet Guerrero, F
Amorin, H
Portelles, JJ
Fundora, A
Siqueiros, JM
Hirata, GA
Aguilera, S
author_role author
author2 Amorin, H
Portelles, JJ
Fundora, A
Siqueiros, JM
Hirata, GA
Aguilera, S
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Materials Science, Ceramics
ferroelectric ceramics
dielectric properties
microstructure
densification
topic Materials Science, Ceramics
ferroelectric ceramics
dielectric properties
microstructure
densification
description A study of the dielectric properties of the Lanthanum doped Sr0.3Ba0.7Nb2O6 (SBN30) ceramic according to the stoichiometric formulation Sr0.3-3y/2LayBa0.7Nb2O6 with y = 0.01, 0.03 and 0.05, and the influence of the sintering conditions is reported. The XRD shows single phase compounds for Sr0.285La0.01Ba0.7Nb2O6 (LSBN1) and Sr0.255La0.03Ba0.7Nb2O6 (LSBN3) ceramics, both samples having similar microstructure, densification and dielectric properties. The density increases linearly with ln t, where t is the sintering time, and the values of the maximum ferroelectric peaks of the permittivity increase steadily with t. Using the Bruggeman model to estimate the theoretical permittivity, it is concluded that the magnitude of the experimental permittivity peaks are mainly affected by the volume fraction of porosity of the samples. In this study we also establish that pore diffusion mechanisms behave according to the Ginstling-Brownshtein equation. For the Sr0.225La0.05Ba0.7Nb2O6 (LSBN5) sample, XRD analysis reveals the presence of isostructural compounds of the intermediate phases BaNb2O6 and SrNb2O6, and the dielectric properties start to deteriorate. This fact indicates the existence of a solubility limit of Lanthanum ions in the SBN solid solution.
publishDate 1999
dc.date.none.fl_str_mv 1999
2011-01-22T10:27:37Z
2011-01-22T10:27:37Z
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv 1385-3449
http://hdl.handle.net/11154/3287
2603
identifier_str_mv 1385-3449
2603
url http://hdl.handle.net/11154/3287
dc.language.none.fl_str_mv en
language_invalid_str_mv en
dc.relation.none.fl_str_mv Journal of Electroceramics
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv 3(4):377-385
reponame:Sistema de Información de la Facultad de Ciencias, UNAM
instname:Universidad Nacional Autónoma de México
instacron:UNAM
instname_str Universidad Nacional Autónoma de México
instacron_str UNAM
institution UNAM
reponame_str Sistema de Información de la Facultad de Ciencias, UNAM
collection Sistema de Información de la Facultad de Ciencias, UNAM
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