Obtenção do sistema nanoestruturado livre de chumbo (Na0,5Bi0,5)0,94Ba0,06TiO3 (NBT-BT6) via rotas químicas
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFSCAR |
Texto Completo: | https://repositorio.ufscar.br/handle/ufscar/14471 |
Resumo: | Perovskites based on sodium bismuth titanate (Na0.5Bi0.5TiO3) are promising candidates for replacing some ceramic materials based on lead due to piezoelectric properties. The solid solution 0.94(Na0.5Bi0.5)TiO3-0.06BaTiO3 (NBT-BT6) can be highlighted as it shows the morphotropic phase boundary in this composition, where its dielectric and ferroelectric properties are maximized, as well as the piezoelectric coefficient. Most studies report the solid-state reaction as a method of obtaining this nanostructured system, which compromises its stoichiometry. Thus, this dissertation aims at the study the achievement of the NBT-BT6 through conventional hydrothermal synthesis and microwave-assisted routes and polymeric precursor - Pechini. In the hydrothermal synthesis, the study of the variation of the mineralizing concentration , time and temperature was carried out, whereas in the polymeric precursor - Pechini method, the temperature of the heat treatment of the dehydrated resin was the analyzed variable. In powders obtained under hydrothermal conditions, both conventionally and assisted by microwaves, the presence of the NBT and BT phases, and the anatase and brookite phases, after synthesis, were identified. Particles in cubic shapes and fibers were formed in both synthesis methods. The powders obtained via microwave-assisted hydrothermal route showed particles with a smaller average size and morphology with a greater presence of fibers, obtained in only 4% of the synthesis time, and after sintering at 900 °C for 2 hours they presented the NBT- BT6 phase and relative density of 87%. In samples synthesized by the polymeric precursor -Pechini method, the NBT-BT6 phase without secondary phases was obtained at 650 °C. In addition, the transformation of the phase at 260 °C, from rhombohedral to tetragonal, was observed for the formation of the solid solution NBT-BT6 indicating the presence of the morphotropic phase boundary and the beginning of crystallization at 450 °C, the lowest temperature reported in the literature. |
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Silva, Gislayne Rayane Alves daKiminami, Ruth Herta Goldschmidt Aliagahttp://lattes.cnpq.br/7643216999108223Perdomo, Claudia Patricia Fernándezhttp://lattes.cnpq.br/0062895903351287http://lattes.cnpq.br/5322024584470497e9306cad-25b4-4a97-90e7-10f572b832cd2021-06-30T11:36:11Z2021-06-30T11:36:11Z2020-09-16SILVA, Gislayne Rayane Alves da. Obtenção do sistema nanoestruturado livre de chumbo (Na0,5Bi0,5)0,94Ba0,06TiO3 (NBT-BT6) via rotas químicas. 2020. Dissertação (Mestrado em Ciência e Engenharia de Materiais) – Universidade Federal de São Carlos, São Carlos, 2020. Disponível em: https://repositorio.ufscar.br/handle/ufscar/14471.https://repositorio.ufscar.br/handle/ufscar/14471Perovskites based on sodium bismuth titanate (Na0.5Bi0.5TiO3) are promising candidates for replacing some ceramic materials based on lead due to piezoelectric properties. The solid solution 0.94(Na0.5Bi0.5)TiO3-0.06BaTiO3 (NBT-BT6) can be highlighted as it shows the morphotropic phase boundary in this composition, where its dielectric and ferroelectric properties are maximized, as well as the piezoelectric coefficient. Most studies report the solid-state reaction as a method of obtaining this nanostructured system, which compromises its stoichiometry. Thus, this dissertation aims at the study the achievement of the NBT-BT6 through conventional hydrothermal synthesis and microwave-assisted routes and polymeric precursor - Pechini. In the hydrothermal synthesis, the study of the variation of the mineralizing concentration , time and temperature was carried out, whereas in the polymeric precursor - Pechini method, the temperature of the heat treatment of the dehydrated resin was the analyzed variable. In powders obtained under hydrothermal conditions, both conventionally and assisted by microwaves, the presence of the NBT and BT phases, and the anatase and brookite phases, after synthesis, were identified. Particles in cubic shapes and fibers were formed in both synthesis methods. The powders obtained via microwave-assisted hydrothermal route showed particles with a smaller average size and morphology with a greater presence of fibers, obtained in only 4% of the synthesis time, and after sintering at 900 °C for 2 hours they presented the NBT- BT6 phase and relative density of 87%. In samples synthesized by the polymeric precursor -Pechini method, the NBT-BT6 phase without secondary phases was obtained at 650 °C. In addition, the transformation of the phase at 260 °C, from rhombohedral to tetragonal, was observed for the formation of the solid solution NBT-BT6 indicating the presence of the morphotropic phase boundary and the beginning of crystallization at 450 °C, the lowest temperature reported in the literature.Perovskitas a base de titanato de bismuto sódio (Na0,5Bi0,5TiO3) são candidatas promissoras à substituição de alguns materiais cerâmicos à base de chumbo, devido às propriedades piezoelétricas. A obtenção da solução sólida 0,94(Na0,5Bi0,5)TiO3-0,06BaTiO3 (NBT-BT6) vem se destacando por exibir, nessa composição, o contorno de fase morfotrópico, na qual suas propriedades dielétricas e ferroelétricas são maximizadas, bem como o coeficiente piezoelétrico. A maioria dos estudos reportam a reação no estado sólido como um método viável de se obter o NBT-BT6, porém, com estequiometria comprometida. Assim, esta dissertação teve como objetivo o estudo da obtenção do NBT-BT6 por meio das rotas de síntese hidrotermal convencional e assistida por micro-ondas e precursor polimérico - Pechini. Na síntese hidrotermal, foi realizado o estudo da variação de concentração do mineralizante, tempo e temperatura, enquanto que no método do precursor polimérico, Pechini, a temperatura de tratamento térmico da resina desidratada foi a variável analisada. Nos pós obtidos sob condições hidrotermais, tanto convencionalmente como assistido por micro-ondas, foram identificadas a presença das fases NBT e BT e as fases anatase e broquita, após a síntese. Partículas em formatos cúbicos e fibras foram formadas em ambos os métodos de síntese. Os pós obtidos via rota hidrotermal assistida por micro-ondas apresentaram partículas com menor tamanho médio e morfologia com maior presença de fibras, obtidos em apenas 4% do tempo de síntese. Após sinterização a 900 °C, durante 2 horas, apresentaram a fase NBT-BT6 e densidade relativa de 87%. Nas amostras sintetizadas pelo método do precursor polimérico, Pechini, a fase NBT-BT6, sem fases secundárias, foi obtida a 650 °C. Além disso, constatou-se a transformação de fase em 260 °C de romboédrica para a tetragonal para a formação da solução sólida NBT-BT6, indicando a presença do contorno de fase morfotrópico, e início de cristalização a 450°C, menor temperatura reportada na literatura.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)CNPq: 158534/2018-2porUniversidade Federal de São CarlosCâmpus São CarlosPrograma de Pós-Graduação em Ciência e Engenharia de Materiais - PPGCEMUFSCarAttribution-NonCommercial-NoDerivs 3.0 Brazilhttp://creativecommons.org/licenses/by-nc-nd/3.0/br/info:eu-repo/semantics/openAccessSínteseHidrotermal micro-ondasPrecursor polimérico - PechiniHidrotermal convencionalNBT-BT6SynthesisMicrowave hydrothermalPolymeric precursorConventional hydrothermalENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::MATERIAIS NAO METALICOSObtenção do sistema nanoestruturado livre de chumbo (Na0,5Bi0,5)0,94Ba0,06TiO3 (NBT-BT6) via rotas químicasAchievement of the nanostructured lead-free system (Na0.5Bi0.5)0.94Ba0.06TiO3 (NBT-BT6) by chemical routesinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis6006005264fc10-1742-443b-9175-b8ba5fc45ddareponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARORIGINALGislayne Rayane Alves da Silva - Dissertação.pdfGislayne Rayane Alves da Silva - Dissertação.pdfDissertaçãoapplication/pdf6635621https://repositorio.ufscar.br/bitstream/ufscar/14471/1/Gislayne%20Rayane%20Alves%20da%20Silva%20-%20Disserta%c3%a7%c3%a3o.pdfb311174d435be3c77cf99ee391c9358fMD51BCO carta comprovante autoarquivamento (1).pdfBCO carta comprovante autoarquivamento (1).pdfcarta comprovanteapplication/pdf1486220https://repositorio.ufscar.br/bitstream/ufscar/14471/2/BCO%20carta%20comprovante%20autoarquivamento%20%281%29.pdfa3b6db3dc8cd16c49c65416c39b58771MD52CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8811https://repositorio.ufscar.br/bitstream/ufscar/14471/3/license_rdfe39d27027a6cc9cb039ad269a5db8e34MD53TEXTGislayne Rayane Alves da Silva - Dissertação.pdf.txtGislayne Rayane Alves da Silva - Dissertação.pdf.txtExtracted texttext/plain194651https://repositorio.ufscar.br/bitstream/ufscar/14471/4/Gislayne%20Rayane%20Alves%20da%20Silva%20-%20Disserta%c3%a7%c3%a3o.pdf.txt71b9484173fb92381913b61f01670412MD54BCO carta comprovante autoarquivamento (1).pdf.txtBCO carta comprovante autoarquivamento (1).pdf.txtExtracted texttext/plain1https://repositorio.ufscar.br/bitstream/ufscar/14471/6/BCO%20carta%20comprovante%20autoarquivamento%20%281%29.pdf.txt68b329da9893e34099c7d8ad5cb9c940MD56THUMBNAILGislayne Rayane Alves da Silva - Dissertação.pdf.jpgGislayne Rayane Alves da Silva - Dissertação.pdf.jpgIM Thumbnailimage/jpeg6311https://repositorio.ufscar.br/bitstream/ufscar/14471/5/Gislayne%20Rayane%20Alves%20da%20Silva%20-%20Disserta%c3%a7%c3%a3o.pdf.jpg27389b8d9f54de20313648ddd5692c51MD55BCO carta comprovante autoarquivamento (1).pdf.jpgBCO carta comprovante autoarquivamento (1).pdf.jpgIM Thumbnailimage/jpeg15500https://repositorio.ufscar.br/bitstream/ufscar/14471/7/BCO%20carta%20comprovante%20autoarquivamento%20%281%29.pdf.jpg41faa9d71f935ce647087070d9fba016MD57ufscar/144712023-09-18 18:32:12.331oai:repositorio.ufscar.br:ufscar/14471Repositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestopendoar:43222023-09-18T18:32:12Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.por.fl_str_mv |
Obtenção do sistema nanoestruturado livre de chumbo (Na0,5Bi0,5)0,94Ba0,06TiO3 (NBT-BT6) via rotas químicas |
dc.title.alternative.eng.fl_str_mv |
Achievement of the nanostructured lead-free system (Na0.5Bi0.5)0.94Ba0.06TiO3 (NBT-BT6) by chemical routes |
title |
Obtenção do sistema nanoestruturado livre de chumbo (Na0,5Bi0,5)0,94Ba0,06TiO3 (NBT-BT6) via rotas químicas |
spellingShingle |
Obtenção do sistema nanoestruturado livre de chumbo (Na0,5Bi0,5)0,94Ba0,06TiO3 (NBT-BT6) via rotas químicas Silva, Gislayne Rayane Alves da Síntese Hidrotermal micro-ondas Precursor polimérico - Pechini Hidrotermal convencional NBT-BT6 Synthesis Microwave hydrothermal Polymeric precursor Conventional hydrothermal ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::MATERIAIS NAO METALICOS |
title_short |
Obtenção do sistema nanoestruturado livre de chumbo (Na0,5Bi0,5)0,94Ba0,06TiO3 (NBT-BT6) via rotas químicas |
title_full |
Obtenção do sistema nanoestruturado livre de chumbo (Na0,5Bi0,5)0,94Ba0,06TiO3 (NBT-BT6) via rotas químicas |
title_fullStr |
Obtenção do sistema nanoestruturado livre de chumbo (Na0,5Bi0,5)0,94Ba0,06TiO3 (NBT-BT6) via rotas químicas |
title_full_unstemmed |
Obtenção do sistema nanoestruturado livre de chumbo (Na0,5Bi0,5)0,94Ba0,06TiO3 (NBT-BT6) via rotas químicas |
title_sort |
Obtenção do sistema nanoestruturado livre de chumbo (Na0,5Bi0,5)0,94Ba0,06TiO3 (NBT-BT6) via rotas químicas |
author |
Silva, Gislayne Rayane Alves da |
author_facet |
Silva, Gislayne Rayane Alves da |
author_role |
author |
dc.contributor.authorlattes.por.fl_str_mv |
http://lattes.cnpq.br/5322024584470497 |
dc.contributor.author.fl_str_mv |
Silva, Gislayne Rayane Alves da |
dc.contributor.advisor1.fl_str_mv |
Kiminami, Ruth Herta Goldschmidt Aliaga |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/7643216999108223 |
dc.contributor.advisor-co1.fl_str_mv |
Perdomo, Claudia Patricia Fernández |
dc.contributor.advisor-co1Lattes.fl_str_mv |
http://lattes.cnpq.br/0062895903351287 |
dc.contributor.authorID.fl_str_mv |
e9306cad-25b4-4a97-90e7-10f572b832cd |
contributor_str_mv |
Kiminami, Ruth Herta Goldschmidt Aliaga Perdomo, Claudia Patricia Fernández |
dc.subject.por.fl_str_mv |
Síntese Hidrotermal micro-ondas Precursor polimérico - Pechini Hidrotermal convencional NBT-BT6 |
topic |
Síntese Hidrotermal micro-ondas Precursor polimérico - Pechini Hidrotermal convencional NBT-BT6 Synthesis Microwave hydrothermal Polymeric precursor Conventional hydrothermal ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::MATERIAIS NAO METALICOS |
dc.subject.eng.fl_str_mv |
Synthesis Microwave hydrothermal Polymeric precursor Conventional hydrothermal |
dc.subject.cnpq.fl_str_mv |
ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::MATERIAIS NAO METALICOS |
description |
Perovskites based on sodium bismuth titanate (Na0.5Bi0.5TiO3) are promising candidates for replacing some ceramic materials based on lead due to piezoelectric properties. The solid solution 0.94(Na0.5Bi0.5)TiO3-0.06BaTiO3 (NBT-BT6) can be highlighted as it shows the morphotropic phase boundary in this composition, where its dielectric and ferroelectric properties are maximized, as well as the piezoelectric coefficient. Most studies report the solid-state reaction as a method of obtaining this nanostructured system, which compromises its stoichiometry. Thus, this dissertation aims at the study the achievement of the NBT-BT6 through conventional hydrothermal synthesis and microwave-assisted routes and polymeric precursor - Pechini. In the hydrothermal synthesis, the study of the variation of the mineralizing concentration , time and temperature was carried out, whereas in the polymeric precursor - Pechini method, the temperature of the heat treatment of the dehydrated resin was the analyzed variable. In powders obtained under hydrothermal conditions, both conventionally and assisted by microwaves, the presence of the NBT and BT phases, and the anatase and brookite phases, after synthesis, were identified. Particles in cubic shapes and fibers were formed in both synthesis methods. The powders obtained via microwave-assisted hydrothermal route showed particles with a smaller average size and morphology with a greater presence of fibers, obtained in only 4% of the synthesis time, and after sintering at 900 °C for 2 hours they presented the NBT- BT6 phase and relative density of 87%. In samples synthesized by the polymeric precursor -Pechini method, the NBT-BT6 phase without secondary phases was obtained at 650 °C. In addition, the transformation of the phase at 260 °C, from rhombohedral to tetragonal, was observed for the formation of the solid solution NBT-BT6 indicating the presence of the morphotropic phase boundary and the beginning of crystallization at 450 °C, the lowest temperature reported in the literature. |
publishDate |
2020 |
dc.date.issued.fl_str_mv |
2020-09-16 |
dc.date.accessioned.fl_str_mv |
2021-06-30T11:36:11Z |
dc.date.available.fl_str_mv |
2021-06-30T11:36:11Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
SILVA, Gislayne Rayane Alves da. Obtenção do sistema nanoestruturado livre de chumbo (Na0,5Bi0,5)0,94Ba0,06TiO3 (NBT-BT6) via rotas químicas. 2020. Dissertação (Mestrado em Ciência e Engenharia de Materiais) – Universidade Federal de São Carlos, São Carlos, 2020. Disponível em: https://repositorio.ufscar.br/handle/ufscar/14471. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufscar.br/handle/ufscar/14471 |
identifier_str_mv |
SILVA, Gislayne Rayane Alves da. Obtenção do sistema nanoestruturado livre de chumbo (Na0,5Bi0,5)0,94Ba0,06TiO3 (NBT-BT6) via rotas químicas. 2020. Dissertação (Mestrado em Ciência e Engenharia de Materiais) – Universidade Federal de São Carlos, São Carlos, 2020. Disponível em: https://repositorio.ufscar.br/handle/ufscar/14471. |
url |
https://repositorio.ufscar.br/handle/ufscar/14471 |
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por |
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600 600 |
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5264fc10-1742-443b-9175-b8ba5fc45dda |
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Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ info:eu-repo/semantics/openAccess |
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Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ |
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openAccess |
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Universidade Federal de São Carlos Câmpus São Carlos |
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Programa de Pós-Graduação em Ciência e Engenharia de Materiais - PPGCEM |
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UFSCar |
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Universidade Federal de São Carlos Câmpus São Carlos |
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