Structural characterization and photoluminescence behavior of pure and doped potassium strontium niobates ceramics with tetragonal tungsten-bronze structure

Detalhes bibliográficos
Autor(a) principal: Lima, A. R.F.
Data de Publicação: 2016
Outros Autores: Sczancoski, J. C. [UNESP], Siu Li, M., Longo, E. [UNESP], Camargo, E. R.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1016/j.ceramint.2015.11.130
http://hdl.handle.net/11449/177745
Resumo: KSr2Nb5O15 and K1.2Sr1.6Ln0.2Nb5O15 (Ln=La, Pr, and Nd) were synthesized by the Pechini method and calcined at 1373 K for 10 h under air atmosphere. Rietveld refinements indicated the presence of structural defects in both KSN and KSN-Ln, especially distortions in O-Nb-O and Nb-O-Nb bonds. Modifications in bond distances of [NbO6] clusters were also confirmed by Raman spectroscopy. Ultraviolet-visible absorption spectra and photoluminescence profiles were influenced by lanthanide atoms in the band structure of modified KSN materials, creating new defects and intermediary energy levels within the band gap.
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spelling Structural characterization and photoluminescence behavior of pure and doped potassium strontium niobates ceramics with tetragonal tungsten-bronze structureC. Optical propertiesCeramicsCrystal structureOptical materialsX-ray diffractionKSr2Nb5O15 and K1.2Sr1.6Ln0.2Nb5O15 (Ln=La, Pr, and Nd) were synthesized by the Pechini method and calcined at 1373 K for 10 h under air atmosphere. Rietveld refinements indicated the presence of structural defects in both KSN and KSN-Ln, especially distortions in O-Nb-O and Nb-O-Nb bonds. Modifications in bond distances of [NbO6] clusters were also confirmed by Raman spectroscopy. Ultraviolet-visible absorption spectra and photoluminescence profiles were influenced by lanthanide atoms in the band structure of modified KSN materials, creating new defects and intermediary energy levels within the band gap.LIEC-Departamento de Química UFSCar Universidade Federal de São Carlos, Rod. Washington Luis, km 235, CP 676Instituto de Química UNESP Universidade Estadual PaulistaIFSC-Universidade de São PauloInstituto de Química UNESP Universidade Estadual PaulistaUniversidade Federal de São Carlos (UFSCar)Universidade Estadual Paulista (Unesp)Universidade de São Paulo (USP)Lima, A. R.F.Sczancoski, J. C. [UNESP]Siu Li, M.Longo, E. [UNESP]Camargo, E. R.2018-12-11T17:26:55Z2018-12-11T17:26:55Z2016-03-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article4709-4714application/pdfhttp://dx.doi.org/10.1016/j.ceramint.2015.11.130Ceramics International, v. 42, n. 4, p. 4709-4714, 2016.0272-8842http://hdl.handle.net/11449/17774510.1016/j.ceramint.2015.11.1302-s2.0-849556677482-s2.0-84955667748.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengCeramics International0,784info:eu-repo/semantics/openAccess2024-01-05T06:21:58Zoai:repositorio.unesp.br:11449/177745Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T22:09:30.762260Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Structural characterization and photoluminescence behavior of pure and doped potassium strontium niobates ceramics with tetragonal tungsten-bronze structure
title Structural characterization and photoluminescence behavior of pure and doped potassium strontium niobates ceramics with tetragonal tungsten-bronze structure
spellingShingle Structural characterization and photoluminescence behavior of pure and doped potassium strontium niobates ceramics with tetragonal tungsten-bronze structure
Lima, A. R.F.
C. Optical properties
Ceramics
Crystal structure
Optical materials
X-ray diffraction
title_short Structural characterization and photoluminescence behavior of pure and doped potassium strontium niobates ceramics with tetragonal tungsten-bronze structure
title_full Structural characterization and photoluminescence behavior of pure and doped potassium strontium niobates ceramics with tetragonal tungsten-bronze structure
title_fullStr Structural characterization and photoluminescence behavior of pure and doped potassium strontium niobates ceramics with tetragonal tungsten-bronze structure
title_full_unstemmed Structural characterization and photoluminescence behavior of pure and doped potassium strontium niobates ceramics with tetragonal tungsten-bronze structure
title_sort Structural characterization and photoluminescence behavior of pure and doped potassium strontium niobates ceramics with tetragonal tungsten-bronze structure
author Lima, A. R.F.
author_facet Lima, A. R.F.
Sczancoski, J. C. [UNESP]
Siu Li, M.
Longo, E. [UNESP]
Camargo, E. R.
author_role author
author2 Sczancoski, J. C. [UNESP]
Siu Li, M.
Longo, E. [UNESP]
Camargo, E. R.
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Universidade Federal de São Carlos (UFSCar)
Universidade Estadual Paulista (Unesp)
Universidade de São Paulo (USP)
dc.contributor.author.fl_str_mv Lima, A. R.F.
Sczancoski, J. C. [UNESP]
Siu Li, M.
Longo, E. [UNESP]
Camargo, E. R.
dc.subject.por.fl_str_mv C. Optical properties
Ceramics
Crystal structure
Optical materials
X-ray diffraction
topic C. Optical properties
Ceramics
Crystal structure
Optical materials
X-ray diffraction
description KSr2Nb5O15 and K1.2Sr1.6Ln0.2Nb5O15 (Ln=La, Pr, and Nd) were synthesized by the Pechini method and calcined at 1373 K for 10 h under air atmosphere. Rietveld refinements indicated the presence of structural defects in both KSN and KSN-Ln, especially distortions in O-Nb-O and Nb-O-Nb bonds. Modifications in bond distances of [NbO6] clusters were also confirmed by Raman spectroscopy. Ultraviolet-visible absorption spectra and photoluminescence profiles were influenced by lanthanide atoms in the band structure of modified KSN materials, creating new defects and intermediary energy levels within the band gap.
publishDate 2016
dc.date.none.fl_str_mv 2016-03-01
2018-12-11T17:26:55Z
2018-12-11T17:26:55Z
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://dx.doi.org/10.1016/j.ceramint.2015.11.130
Ceramics International, v. 42, n. 4, p. 4709-4714, 2016.
0272-8842
http://hdl.handle.net/11449/177745
10.1016/j.ceramint.2015.11.130
2-s2.0-84955667748
2-s2.0-84955667748.pdf
url http://dx.doi.org/10.1016/j.ceramint.2015.11.130
http://hdl.handle.net/11449/177745
identifier_str_mv Ceramics International, v. 42, n. 4, p. 4709-4714, 2016.
0272-8842
10.1016/j.ceramint.2015.11.130
2-s2.0-84955667748
2-s2.0-84955667748.pdf
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Ceramics International
0,784
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 4709-4714
application/pdf
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
_version_ 1808129398351593472

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