Structural, morphological and dielectric properties of ErNbO4 prepared by the sol-gel method

Detalhes bibliográficos
Autor(a) principal: Devesa, S.
Data de Publicação: 2020
Outros Autores: Teixeira, S. Soreto, Rooney, A.P., Graça, M.P., Cooper, D., Costa, L.C.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10773/37512
Resumo: In this work, ErNbO4 samples were prepared using the sol-gel method, through the citrate route, and heat-treated at temperatures between 700 and 1600 °C. The structure was studied by X-ray diffraction and Raman spectroscopy. The crystallite size was estimated using the Rietveld refinement and the Sherrer's formula, presenting values from 31.27 to 86.65 nm and from 40.96 to 78.23 nm, respectively. The morphology was studied by scanning electron microscopy. The measurement of the complex permittivity was made using the small perturbation technique, with a cavity operating in TE105 mode, at resonant frequency of 2.7 GHz. The increase of the treatment temperature promoted the increase of the dielectric constant and the dielectric losses were still maintained with low values, allowing their potential application in electric storage devices. The dielectric constant of ErNbO4 in a zero porosity sample case was estimated and compared with the experimental values.
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spelling Structural, morphological and dielectric properties of ErNbO4 prepared by the sol-gel methodCeramicsSol-gelRare-earth orthoniobatesMicrowaveDielectric propertiesIn this work, ErNbO4 samples were prepared using the sol-gel method, through the citrate route, and heat-treated at temperatures between 700 and 1600 °C. The structure was studied by X-ray diffraction and Raman spectroscopy. The crystallite size was estimated using the Rietveld refinement and the Sherrer's formula, presenting values from 31.27 to 86.65 nm and from 40.96 to 78.23 nm, respectively. The morphology was studied by scanning electron microscopy. The measurement of the complex permittivity was made using the small perturbation technique, with a cavity operating in TE105 mode, at resonant frequency of 2.7 GHz. The increase of the treatment temperature promoted the increase of the dielectric constant and the dielectric losses were still maintained with low values, allowing their potential application in electric storage devices. The dielectric constant of ErNbO4 in a zero porosity sample case was estimated and compared with the experimental values.Elsevier2023-05-04T15:36:20Z2020-11-01T00:00:00Z2020-11info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10773/37512eng0022-369710.1016/j.jpcs.2020.109619Devesa, S.Teixeira, S. SoretoRooney, A.P.Graça, M.P.Cooper, D.Costa, L.C.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-02-22T12:12:31Zoai:ria.ua.pt:10773/37512Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:08:08.303728Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Structural, morphological and dielectric properties of ErNbO4 prepared by the sol-gel method
title Structural, morphological and dielectric properties of ErNbO4 prepared by the sol-gel method
spellingShingle Structural, morphological and dielectric properties of ErNbO4 prepared by the sol-gel method
Devesa, S.
Ceramics
Sol-gel
Rare-earth orthoniobates
Microwave
Dielectric properties
title_short Structural, morphological and dielectric properties of ErNbO4 prepared by the sol-gel method
title_full Structural, morphological and dielectric properties of ErNbO4 prepared by the sol-gel method
title_fullStr Structural, morphological and dielectric properties of ErNbO4 prepared by the sol-gel method
title_full_unstemmed Structural, morphological and dielectric properties of ErNbO4 prepared by the sol-gel method
title_sort Structural, morphological and dielectric properties of ErNbO4 prepared by the sol-gel method
author Devesa, S.
author_facet Devesa, S.
Teixeira, S. Soreto
Rooney, A.P.
Graça, M.P.
Cooper, D.
Costa, L.C.
author_role author
author2 Teixeira, S. Soreto
Rooney, A.P.
Graça, M.P.
Cooper, D.
Costa, L.C.
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Devesa, S.
Teixeira, S. Soreto
Rooney, A.P.
Graça, M.P.
Cooper, D.
Costa, L.C.
dc.subject.por.fl_str_mv Ceramics
Sol-gel
Rare-earth orthoniobates
Microwave
Dielectric properties
topic Ceramics
Sol-gel
Rare-earth orthoniobates
Microwave
Dielectric properties
description In this work, ErNbO4 samples were prepared using the sol-gel method, through the citrate route, and heat-treated at temperatures between 700 and 1600 °C. The structure was studied by X-ray diffraction and Raman spectroscopy. The crystallite size was estimated using the Rietveld refinement and the Sherrer's formula, presenting values from 31.27 to 86.65 nm and from 40.96 to 78.23 nm, respectively. The morphology was studied by scanning electron microscopy. The measurement of the complex permittivity was made using the small perturbation technique, with a cavity operating in TE105 mode, at resonant frequency of 2.7 GHz. The increase of the treatment temperature promoted the increase of the dielectric constant and the dielectric losses were still maintained with low values, allowing their potential application in electric storage devices. The dielectric constant of ErNbO4 in a zero porosity sample case was estimated and compared with the experimental values.
publishDate 2020
dc.date.none.fl_str_mv 2020-11-01T00:00:00Z
2020-11
2023-05-04T15:36:20Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10773/37512
url http://hdl.handle.net/10773/37512
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 0022-3697
10.1016/j.jpcs.2020.109619
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 Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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