Propriedades vibracionais no composto Aurivillius Bi₃Fe₀ ₅Nb₁ ₅O₉

Detalhes bibliográficos
Ano de defesa: 2012
Autor(a) principal: Silva, Ariel lattes
Orientador(a): Paschoal, Carlos William
Banca de defesa: Paschoal, Carlos William de Araújo, Silva, Éder Nascimento, Souza Filho, Antonio Gomes de
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
dARK ID: ark:/80033/001300000253f
Idioma: por
Instituição de defesa: Universidade Federal do Maranhão
Programa de Pós-Graduação: Programa de Pós - Graduação em Física
Departamento: Departamento de Física
País: Brasil
Palavras-chave em Português:
Espectroscopia Raman
Infravermelho
Propriedades vibracionais da cerâmica
Infrared Vibrational properties of ceramics
Palavras-chave em Inglês:
Raman spectroscop
Área do conhecimento CNPq:
CNPQ, CIENCIAS EXATAS E DA TERRA, FISICA
Link de acesso: https://deposita.ibict.br/handle/deposita/721
Resumo: In this work we investigated the vibrational and dielectric properties of the ceramic Bi₃Fe₀ ₅Nb₁ ₅O₉(BFN) at room temperature by using the Raman and infrared spectroscopic techniques along with classical lattice dynamics calculations. Concerning the Raman modes, fifteen vibrational modes at room temperature, were observed and classified based on performed lattice dynamics calculations. The temperature dependent Raman spectra showed clearly the ferroelectric phase transition in BFN at around 250 ° C, as discussed in the literature. The dielectric properties as well as Longitudinal (LO) and Transverse (TO) optical modes were obtained by adjusting the reflectivity spectrum of BFN at room temperature. We calculated static dielectric constant as εs = 30, which is relatively larger than the minimum value required for passive devices used in microwave electronics (εs > 10). Finally, we determined the dielectric loss in the microwave region yielding a quality factor Q = 2040 (10 GHz).
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spelling Paschoal, Carlos WilliamPaschoal, Carlos William de AraújoSilva, Éder NascimentoSouza Filho, Antonio Gomes de1872103570https://lattes.cnpq.br/0249458249168659Silva, Ariel2024-12-13T18:59:00Z2012https://deposita.ibict.br/handle/deposita/721ark:/80033/001300000253fIn this work we investigated the vibrational and dielectric properties of the ceramic Bi₃Fe₀ ₅Nb₁ ₅O₉(BFN) at room temperature by using the Raman and infrared spectroscopic techniques along with classical lattice dynamics calculations. Concerning the Raman modes, fifteen vibrational modes at room temperature, were observed and classified based on performed lattice dynamics calculations. The temperature dependent Raman spectra showed clearly the ferroelectric phase transition in BFN at around 250 ° C, as discussed in the literature. The dielectric properties as well as Longitudinal (LO) and Transverse (TO) optical modes were obtained by adjusting the reflectivity spectrum of BFN at room temperature. We calculated static dielectric constant as εs = 30, which is relatively larger than the minimum value required for passive devices used in microwave electronics (εs > 10). Finally, we determined the dielectric loss in the microwave region yielding a quality factor Q = 2040 (10 GHz).No presente trabalho investigamos as propriedades vibracionais e dielétricas da cerâmica Bi₃Fe₀ ₅Nb₁ ₅O₉ (BFN) em função da temperatura através das técnicas de espectroscopia Raman e no Infravermelho (IR), além de dinâmica de rede. No que diz respeito aos modos Raman, foram observados quinze modos à temperatura ambiente, os quais foram classificados com base nos cálculos realizados por Dinâmica de Rede (LD). A análise do espectro Raman dependente da temperatura mostrou claramente a transição de fase ferroelétrica que ocorre em torno de 250oC para o BFN conforme previsto na literatura. As propriedades dielétricas assim como os modos Longitudinais (LO) e Transversais (TO) ópticos foram obtidos a partir do ajuste do espectro de refletividade do BFN à temperatura ambiente, onde encontramos a constante dielétrica estática εs = 30, que é relativamente maior que o valor mínimo requerido para dispositivos passivos usados em circuitos eletrônicos de microondas (εs > 10). Por fim, determinamos a perda dielétrica na região de microondas e a partir desta obtivemos um fator de qualidade Q = 2040 (10 GHz) .CAPESNordesteapplication/pdfporUniversidade Federal do MaranhãoPrograma de Pós - Graduação em FísicaBrasilDepartamento de FísicaEspectroscopia RamanInfravermelhoPropriedades vibracionais da cerâmicaInfrared Vibrational properties of ceramicsRaman spectroscopCNPQ, CIENCIAS EXATAS E DA TERRA, FISICAPropriedades vibracionais no composto Aurivillius Bi₃Fe₀ ₅Nb₁ ₅O₉info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:Repositório Comum do Brasil - Depositainstname:Instituto Brasileiro de Informação em Ciência e Tecnologia (Ibict)instacron:IBICTTEXTDissertacao Ariel.pdf.txtWritten by FormatFilter org.dspace.app.mediafilter.TikaTextExtractionFilter on 2025-06-06T20:17:30Z (GMT).Extracted texttext/plain102774https://deposita.ibict.br/bitstreams/853e922b-11d9-4f63-a22c-d1171ec44509/download3a6f3c9c6c3d03145c126c811c552260MD53falseAnonymousREADTHUMBNAILDissertacao Ariel.pdf.jpgWritten by FormatFilter org.dspace.app.mediafilter.PDFBoxThumbnail on 2025-06-06T20:17:30Z (GMT).Generated Thumbnailimage/jpeg2969https://deposita.ibict.br/bitstreams/0f70289b-4a39-4105-848a-b2f461141af5/downloadf6984fc05cc8bacdd7cac4fa0554cb9fMD54falseAnonymousREADLICENSElicense.txtWritten by org.dspace.content.LicenseUtilstext/plain; charset=utf-81867https://deposita.ibict.br/bitstreams/bc839b04-5a53-42e1-9943-669c7ca5a35c/downloada7c148eec59885ba1ba6d14692be8465MD51falseAnonymousREADORIGINALDissertacao Ariel.pdf/dspace/deposita/upload/Dissertacao Ariel.pdfDissertação de mestradoapplication/pdf4799724https://deposita.ibict.br/bitstreams/018b03f7-0ec3-4803-97d4-e92cf7543467/downloaddf91070ea00eacc67634f167b01b4880MD52trueAnonymousREADdeposita/7212025-10-01T14:10:04.715Zopen.accessoai:deposita.ibict.br:deposita/721https://deposita.ibict.brRepositório ComumPUBhttp://deposita.ibict.br/oai/requestdeposita@ibict.bropendoar:46582025-10-01T14:10:04Repositório Comum do Brasil - Deposita - Instituto Brasileiro de Informação em Ciência e Tecnologia (Ibict)falseTElDRU7Dh0EgREUgRElTVFJJQlVJw4fDg08gTsODTy1FWENMVVNJVkEKCkNvbSBhIGFwcmVzZW50YcOnw6NvIGRlc3RhIGxpY2Vuw6dhLCB2b2PDqiAobyBhdXRvciAoZXMpIG91IG8gdGl0dWxhciBkb3MgZGlyZWl0b3MgZGUgYXV0b3IpIGNvbmNlZGUgYW8gUmVwb3NpdMOzcmlvIENvbXVtCmRvIEJyYXNpbCAoRGVwb3NpdGEpIG8gZGlyZWl0byBuw6NvLWV4Y2x1c2l2byBkZSByZXByb2R1emlyLCB0cmFkdXppciAoY29uZm9ybWUgZGVmaW5pZG8gYWJhaXhvKSwgZS9vdSBkaXN0cmlidWlyIGEKc3VhIHB1YmxpY2HDp8OjbyAoaW5jbHVpbmRvIG8gcmVzdW1vKSBwb3IgdG9kbyBvIG11bmRvIG5vIGZvcm1hdG8gaW1wcmVzc28gZSBlbGV0csO0bmljbyBlIGVtIHF1YWxxdWVyIG1laW8sIGluY2x1aW5kbyBvcwpmb3JtYXRvcyDDoXVkaW8gb3UgdsOtZGVvLgoKVm9jw6ogY29uY29yZGEgcXVlIG8gRGVwb3NpdGEgcG9kZSwgc2VtIGFsdGVyYXIgbyBjb250ZcO6ZG8sIHRyYW5zcG9yIGEgc3VhIHB1YmxpY2HDp8OjbyBwYXJhIHF1YWxxdWVyIG1laW8gb3UgZm9ybWF0bwpwYXJhIGZpbnMgZGUgcHJlc2VydmHDp8Ojby4KClZvY8OqIHRhbWLDqW0gY29uY29yZGEgcXVlIG8gRGVwb3NpdGEgcG9kZSBtYW50ZXIgbWFpcyBkZSB1bWEgY8OzcGlhIGRlIHN1YSBwdWJsaWNhw6fDo28gcGFyYSBmaW5zIGRlIHNlZ3VyYW7Dp2EsIGJhY2stdXAKZSBwcmVzZXJ2YcOnw6NvLgoKVm9jw6ogZGVjbGFyYSBxdWUgYSBzdWEgcHVibGljYcOnw6NvIMOpIG9yaWdpbmFsIGUgcXVlIHZvY8OqIHRlbSBvIHBvZGVyIGRlIGNvbmNlZGVyIG9zIGRpcmVpdG9zIGNvbnRpZG9zIG5lc3RhIGxpY2Vuw6dhLgpWb2PDqiB0YW1iw6ltIGRlY2xhcmEgcXVlIG8gZGVww7NzaXRvIGRhIHN1YSBwdWJsaWNhw6fDo28gbsOjbywgcXVlIHNlamEgZGUgc2V1IGNvbmhlY2ltZW50bywgaW5mcmluZ2UgZGlyZWl0b3MgYXV0b3JhaXMKZGUgbmluZ3XDqW0uCgpDYXNvIGEgc3VhIHB1YmxpY2HDp8OjbyBjb250ZW5oYSBtYXRlcmlhbCBxdWUgdm9jw6ogbsOjbyBwb3NzdWkgYSB0aXR1bGFyaWRhZGUgZG9zIGRpcmVpdG9zIGF1dG9yYWlzLCB2b2PDqiBkZWNsYXJhIHF1ZQpvYnRldmUgYSBwZXJtaXNzw6NvIGlycmVzdHJpdGEgZG8gZGV0ZW50b3IgZG9zIGRpcmVpdG9zIGF1dG9yYWlzIHBhcmEgY29uY2VkZXIgYW8gRGVwb3NpdGEgb3MgZGlyZWl0b3MgYXByZXNlbnRhZG9zCm5lc3RhIGxpY2Vuw6dhLCBlIHF1ZSBlc3NlIG1hdGVyaWFsIGRlIHByb3ByaWVkYWRlIGRlIHRlcmNlaXJvcyBlc3TDoSBjbGFyYW1lbnRlIGlkZW50aWZpY2FkbyBlIHJlY29uaGVjaWRvIG5vIHRleHRvCm91IG5vIGNvbnRlw7pkbyBkYSBwdWJsaWNhw6fDo28gb3JhIGRlcG9zaXRhZGEuCgpDQVNPIEEgUFVCTElDQcOHw4NPIE9SQSBERVBPU0lUQURBIFRFTkhBIFNJRE8gUkVTVUxUQURPIERFIFVNIFBBVFJPQ8ONTklPIE9VIEFQT0lPIERFIFVNQSBBR8OKTkNJQSBERSBGT01FTlRPIE9VIE9VVFJPCk9SR0FOSVNNTywgVk9Dw4ogREVDTEFSQSBRVUUgUkVTUEVJVE9VIFRPRE9TIEUgUVVBSVNRVUVSIERJUkVJVE9TIERFIFJFVklTw4NPIENPTU8gVEFNQsOJTSBBUyBERU1BSVMgT0JSSUdBw4fDlUVTCkVYSUdJREFTIFBPUiBDT05UUkFUTyBPVSBBQ09SRE8uCgpPIERlcG9zaXRhIHNlIGNvbXByb21ldGUgYSBpZGVudGlmaWNhciBjbGFyYW1lbnRlIG8gc2V1IG5vbWUgKHMpIG91IG8ocykgbm9tZShzKSBkbyhzKSBkZXRlbnRvcihlcykgZG9zIGRpcmVpdG9zCmF1dG9yYWlzIGRhIHB1YmxpY2HDp8OjbywgZSBuw6NvIGZhcsOhIHF1YWxxdWVyIGFsdGVyYcOnw6NvLCBhbMOpbSBkYXF1ZWxhcyBjb25jZWRpZGFzIHBvciBlc3RhIGxpY2Vuw6dhLgoKCg==
dc.title.por.fl_str_mv Propriedades vibracionais no composto Aurivillius Bi₃Fe₀ ₅Nb₁ ₅O₉
title Propriedades vibracionais no composto Aurivillius Bi₃Fe₀ ₅Nb₁ ₅O₉
spellingShingle Propriedades vibracionais no composto Aurivillius Bi₃Fe₀ ₅Nb₁ ₅O₉
Silva, Ariel
Espectroscopia Raman
Infravermelho
Propriedades vibracionais da cerâmica
Infrared Vibrational properties of ceramics
Raman spectroscop
CNPQ, CIENCIAS EXATAS E DA TERRA, FISICA
title_short Propriedades vibracionais no composto Aurivillius Bi₃Fe₀ ₅Nb₁ ₅O₉
title_full Propriedades vibracionais no composto Aurivillius Bi₃Fe₀ ₅Nb₁ ₅O₉
title_fullStr Propriedades vibracionais no composto Aurivillius Bi₃Fe₀ ₅Nb₁ ₅O₉
title_full_unstemmed Propriedades vibracionais no composto Aurivillius Bi₃Fe₀ ₅Nb₁ ₅O₉
title_sort Propriedades vibracionais no composto Aurivillius Bi₃Fe₀ ₅Nb₁ ₅O₉
author Silva, Ariel
author_facet Silva, Ariel
author_role author
dc.contributor.advisor1.fl_str_mv Paschoal, Carlos William
dc.contributor.referee1.fl_str_mv Paschoal, Carlos William de Araújo
dc.contributor.referee2.fl_str_mv Silva, Éder Nascimento
dc.contributor.referee3.fl_str_mv Souza Filho, Antonio Gomes de
dc.contributor.authorID.fl_str_mv 1872103570
dc.contributor.authorLattes.fl_str_mv https://lattes.cnpq.br/0249458249168659
dc.contributor.author.fl_str_mv Silva, Ariel
contributor_str_mv Paschoal, Carlos William
Paschoal, Carlos William de Araújo
Silva, Éder Nascimento
Souza Filho, Antonio Gomes de
dc.subject.por.fl_str_mv Espectroscopia Raman
Infravermelho
Propriedades vibracionais da cerâmica
Infrared Vibrational properties of ceramics
topic Espectroscopia Raman
Infravermelho
Propriedades vibracionais da cerâmica
Infrared Vibrational properties of ceramics
Raman spectroscop
CNPQ, CIENCIAS EXATAS E DA TERRA, FISICA
dc.subject.eng.fl_str_mv Raman spectroscop
dc.subject.cnpq.fl_str_mv CNPQ, CIENCIAS EXATAS E DA TERRA, FISICA
description In this work we investigated the vibrational and dielectric properties of the ceramic Bi₃Fe₀ ₅Nb₁ ₅O₉(BFN) at room temperature by using the Raman and infrared spectroscopic techniques along with classical lattice dynamics calculations. Concerning the Raman modes, fifteen vibrational modes at room temperature, were observed and classified based on performed lattice dynamics calculations. The temperature dependent Raman spectra showed clearly the ferroelectric phase transition in BFN at around 250 ° C, as discussed in the literature. The dielectric properties as well as Longitudinal (LO) and Transverse (TO) optical modes were obtained by adjusting the reflectivity spectrum of BFN at room temperature. We calculated static dielectric constant as εs = 30, which is relatively larger than the minimum value required for passive devices used in microwave electronics (εs > 10). Finally, we determined the dielectric loss in the microwave region yielding a quality factor Q = 2040 (10 GHz).
publishDate 2012
dc.date.issued.fl_str_mv 2012
dc.date.accessioned.fl_str_mv 2024-12-13T18:59:00Z
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.uri.fl_str_mv https://deposita.ibict.br/handle/deposita/721
dc.identifier.dark.fl_str_mv ark:/80033/001300000253f
url https://deposita.ibict.br/handle/deposita/721
identifier_str_mv ark:/80033/001300000253f
dc.language.iso.fl_str_mv por
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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 Federal do Maranhão
dc.publisher.program.fl_str_mv Programa de Pós - Graduação em Física
dc.publisher.country.fl_str_mv Brasil
dc.publisher.department.fl_str_mv Departamento de Física
publisher.none.fl_str_mv Universidade Federal do Maranhão
dc.source.none.fl_str_mv reponame:Repositório Comum do Brasil - Deposita
instname:Instituto Brasileiro de Informação em Ciência e Tecnologia (Ibict)
instacron:IBICT
instname_str Instituto Brasileiro de Informação em Ciência e Tecnologia (Ibict)
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