Properties of bismuth-strontium titanate ceramics doped with MnO2 and Nd2O3.

Bibliographic Details
Main Author: Gelfuso, Maria Virginia
Publication Date: 2009
Other Authors: Eiras, José Antônio, Thomazini, Daniel
Format: Article
Language: por
Source: Revista Tecnologia (Fortaleza. Online)
Download full: https://ojs.unifor.br/tec/article/view/51
Summary: Strontium bismuth titanate samples (SBT) doped with 4-mol % of MnO2 (SBT + Mn) or Nd2O3 (SBT + Nd) were produced by conventional oxide mixture method. The structural, dielectric and piezoelectric properties were compared between the pure and doped ceramics. The aspect ratio of the grains (Width/Thickness – W/T) was modified with the addition of the dopants, being more evident in the SBT + Mn ceramic than in the others. The neodymium addition increased the electromechanical coupling factor of the ceramics while the manganese doping favored the reduction of this parameter. The values of coercive field, saturation and remanent polarization for the SBT + Mn ceramic were higher than that obtained to SBT and SBT + Nd ceramics.
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spelling Properties of bismuth-strontium titanate ceramics doped with MnO2 and Nd2O3.Propriedades de cerâmicas de titanato de bismuto-estrôncio dopadas MnO2 ou Nd2O3.Propriedades dielétricas. Ferroelétrico. Perovskitas. BLSF.Strontium bismuth titanate samples (SBT) doped with 4-mol % of MnO2 (SBT + Mn) or Nd2O3 (SBT + Nd) were produced by conventional oxide mixture method. The structural, dielectric and piezoelectric properties were compared between the pure and doped ceramics. The aspect ratio of the grains (Width/Thickness – W/T) was modified with the addition of the dopants, being more evident in the SBT + Mn ceramic than in the others. The neodymium addition increased the electromechanical coupling factor of the ceramics while the manganese doping favored the reduction of this parameter. The values of coercive field, saturation and remanent polarization for the SBT + Mn ceramic were higher than that obtained to SBT and SBT + Nd ceramics.Cerâmicas de titanato de bismuto-estrôncio (SBT) dopadas com 4 % em mol de MnO2 (SBT+Mn) ou Nd2O3 (SBT+Nd) foram produzidas através do método convencional de mistura de óxidos. As propriedades estruturais, dielétricas e piezoelétricas foram comparadas entre as cerâmicas puras e dopadas. A razão de aspecto dos grãos (Comprimento/Espessura – C/E) foi modificada com a adição dos dopantes, sendo mais evidente nas cerâmicas SBT+Mn. A adição de neodímio aumentou o fator de acoplamento eletromecânico das cerâmicas enquanto que a dopagem com manganês favoreceu a redução deste parâmetro. Os valores do campo coercitivo, da polarização remanescente e de saturação para as cerâmicas SBT+Mn foram maiores que aqueles obtidos para as cerâmicas SBT e SBT+Nd.Universidade de Fortaleza - Unifor2009-05-15info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://ojs.unifor.br/tec/article/view/51Revista Tecnologia; v. 28 n. 2 (2007)2318-07300101-8191reponame:Revista Tecnologia (Fortaleza. Online)instname:Universidade de Fortaleza (UNIFOR)instacron:UFORporhttps://ojs.unifor.br/tec/article/view/51/4460Gelfuso, Maria VirginiaEiras, José AntônioThomazini, Danielinfo:eu-repo/semantics/openAccess2017-08-29T14:05:44Zoai:ojs3.ojs.unifor.br:article/51Revistahttps://ojs.unifor.br/tecPUBhttps://ojs.unifor.br/tec/oairevistatecnologia@unifor.br2318-07300101-8191opendoar:2017-08-29T14:05:44Revista Tecnologia (Fortaleza. Online) - Universidade de Fortaleza (UNIFOR)false
dc.title.none.fl_str_mv Properties of bismuth-strontium titanate ceramics doped with MnO2 and Nd2O3.
Propriedades de cerâmicas de titanato de bismuto-estrôncio dopadas MnO2 ou Nd2O3.
title Properties of bismuth-strontium titanate ceramics doped with MnO2 and Nd2O3.
spellingShingle Properties of bismuth-strontium titanate ceramics doped with MnO2 and Nd2O3.
Gelfuso, Maria Virginia
Propriedades dielétricas. Ferroelétrico. Perovskitas. BLSF.
title_short Properties of bismuth-strontium titanate ceramics doped with MnO2 and Nd2O3.
title_full Properties of bismuth-strontium titanate ceramics doped with MnO2 and Nd2O3.
title_fullStr Properties of bismuth-strontium titanate ceramics doped with MnO2 and Nd2O3.
title_full_unstemmed Properties of bismuth-strontium titanate ceramics doped with MnO2 and Nd2O3.
title_sort Properties of bismuth-strontium titanate ceramics doped with MnO2 and Nd2O3.
author Gelfuso, Maria Virginia
author_facet Gelfuso, Maria Virginia
Eiras, José Antônio
Thomazini, Daniel
author_role author
author2 Eiras, José Antônio
Thomazini, Daniel
author2_role author
author
dc.contributor.author.fl_str_mv Gelfuso, Maria Virginia
Eiras, José Antônio
Thomazini, Daniel
dc.subject.por.fl_str_mv Propriedades dielétricas. Ferroelétrico. Perovskitas. BLSF.
topic Propriedades dielétricas. Ferroelétrico. Perovskitas. BLSF.
description Strontium bismuth titanate samples (SBT) doped with 4-mol % of MnO2 (SBT + Mn) or Nd2O3 (SBT + Nd) were produced by conventional oxide mixture method. The structural, dielectric and piezoelectric properties were compared between the pure and doped ceramics. The aspect ratio of the grains (Width/Thickness – W/T) was modified with the addition of the dopants, being more evident in the SBT + Mn ceramic than in the others. The neodymium addition increased the electromechanical coupling factor of the ceramics while the manganese doping favored the reduction of this parameter. The values of coercive field, saturation and remanent polarization for the SBT + Mn ceramic were higher than that obtained to SBT and SBT + Nd ceramics.
publishDate 2009
dc.date.none.fl_str_mv 2009-05-15
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://ojs.unifor.br/tec/article/view/51
url https://ojs.unifor.br/tec/article/view/51
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://ojs.unifor.br/tec/article/view/51/4460
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade de Fortaleza - Unifor
publisher.none.fl_str_mv Universidade de Fortaleza - Unifor
dc.source.none.fl_str_mv Revista Tecnologia; v. 28 n. 2 (2007)
2318-0730
0101-8191
reponame:Revista Tecnologia (Fortaleza. Online)
instname:Universidade de Fortaleza (UNIFOR)
instacron:UFOR
instname_str Universidade de Fortaleza (UNIFOR)
instacron_str UFOR
institution UFOR
reponame_str Revista Tecnologia (Fortaleza. Online)
collection Revista Tecnologia (Fortaleza. Online)
repository.name.fl_str_mv Revista Tecnologia (Fortaleza. Online) - Universidade de Fortaleza (UNIFOR)
repository.mail.fl_str_mv revistatecnologia@unifor.br
_version_ 1839257376408993792

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