Relaxation processes in TiO2–V2O5–P2O5 glass-ceramics
Autor(a) principal: | |
---|---|
Data de Publicação: | 2021 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10773/37721 |
Resumo: | Bulk samples of the ternary TiO2–V2O5–P2O5 system have been synthesized by the melt-quenching technique. X-ray diffraction and scanning electron microscopy with energy-dispersive spectroscopy were applied for structure and composition identification, whereby the presence of NASICON and Rutile type structures were identified. Dielectric properties were measured using impedance spectroscopy, at frequencies from 10 mHz to 1 MHz, and temperatures between 40 °C and 190 °C. Different relaxation models were applied to fit the experimental data. The electrical conductivity and activation energy of the glass matrix and crystalline particles were calculated and correlated to the structure of the material. The impedance spectra were analyzed with the complex dielectric modulus and the Distribution Function of Relaxation Times method to corroborate and complement the results of equivalent circuit models. The grain conductivity was shown to reach 10-1 S/m at 190 °C for the NASICON sample. |
id |
RCAP_e9d6c6cad4b9d08bcca817fd9041dcc4 |
---|---|
oai_identifier_str |
oai:ria.ua.pt:10773/37721 |
network_acronym_str |
RCAP |
network_name_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository_id_str |
|
spelling |
Relaxation processes in TiO2–V2O5–P2O5 glass-ceramicsGlass-ceramicsElectrical conductivityImpedance spectroscopyDielectric relaxationBulk samples of the ternary TiO2–V2O5–P2O5 system have been synthesized by the melt-quenching technique. X-ray diffraction and scanning electron microscopy with energy-dispersive spectroscopy were applied for structure and composition identification, whereby the presence of NASICON and Rutile type structures were identified. Dielectric properties were measured using impedance spectroscopy, at frequencies from 10 mHz to 1 MHz, and temperatures between 40 °C and 190 °C. Different relaxation models were applied to fit the experimental data. The electrical conductivity and activation energy of the glass matrix and crystalline particles were calculated and correlated to the structure of the material. The impedance spectra were analyzed with the complex dielectric modulus and the Distribution Function of Relaxation Times method to corroborate and complement the results of equivalent circuit models. The grain conductivity was shown to reach 10-1 S/m at 190 °C for the NASICON sample.Elsevier2023-10-15T00:00:00Z2021-10-15T00:00:00Z2021-10-15info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10773/37721eng0272-884210.1016/j.ceramint.2021.06.267Melo, B.M.G.Blaskova-Kochnitcharova, D.Teixeira, S. SoretoLefterova, E.Petkov, P.Petkova, T.Costa, L.C.info:eu-repo/semantics/embargoedAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-17T04:20:11ZPortal AgregadorONG |
dc.title.none.fl_str_mv |
Relaxation processes in TiO2–V2O5–P2O5 glass-ceramics |
title |
Relaxation processes in TiO2–V2O5–P2O5 glass-ceramics |
spellingShingle |
Relaxation processes in TiO2–V2O5–P2O5 glass-ceramics Melo, B.M.G. Glass-ceramics Electrical conductivity Impedance spectroscopy Dielectric relaxation |
title_short |
Relaxation processes in TiO2–V2O5–P2O5 glass-ceramics |
title_full |
Relaxation processes in TiO2–V2O5–P2O5 glass-ceramics |
title_fullStr |
Relaxation processes in TiO2–V2O5–P2O5 glass-ceramics |
title_full_unstemmed |
Relaxation processes in TiO2–V2O5–P2O5 glass-ceramics |
title_sort |
Relaxation processes in TiO2–V2O5–P2O5 glass-ceramics |
author |
Melo, B.M.G. |
author_facet |
Melo, B.M.G. Blaskova-Kochnitcharova, D. Teixeira, S. Soreto Lefterova, E. Petkov, P. Petkova, T. Costa, L.C. |
author_role |
author |
author2 |
Blaskova-Kochnitcharova, D. Teixeira, S. Soreto Lefterova, E. Petkov, P. Petkova, T. Costa, L.C. |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Melo, B.M.G. Blaskova-Kochnitcharova, D. Teixeira, S. Soreto Lefterova, E. Petkov, P. Petkova, T. Costa, L.C. |
dc.subject.por.fl_str_mv |
Glass-ceramics Electrical conductivity Impedance spectroscopy Dielectric relaxation |
topic |
Glass-ceramics Electrical conductivity Impedance spectroscopy Dielectric relaxation |
description |
Bulk samples of the ternary TiO2–V2O5–P2O5 system have been synthesized by the melt-quenching technique. X-ray diffraction and scanning electron microscopy with energy-dispersive spectroscopy were applied for structure and composition identification, whereby the presence of NASICON and Rutile type structures were identified. Dielectric properties were measured using impedance spectroscopy, at frequencies from 10 mHz to 1 MHz, and temperatures between 40 °C and 190 °C. Different relaxation models were applied to fit the experimental data. The electrical conductivity and activation energy of the glass matrix and crystalline particles were calculated and correlated to the structure of the material. The impedance spectra were analyzed with the complex dielectric modulus and the Distribution Function of Relaxation Times method to corroborate and complement the results of equivalent circuit models. The grain conductivity was shown to reach 10-1 S/m at 190 °C for the NASICON sample. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-10-15T00:00:00Z 2021-10-15 2023-10-15T00:00:00Z |
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/10773/37721 |
url |
http://hdl.handle.net/10773/37721 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
0272-8842 10.1016/j.ceramint.2021.06.267 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/embargoedAccess |
eu_rights_str_mv |
embargoedAccess |
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 |
|
repository.mail.fl_str_mv |
|
_version_ |
1777303601591353344 |