Luminescence study of mixed valence Eu-doped nanocrystalline glass-ceramics

Eu-doped nanocrystalline NaAlSiO4/NaY9Si6O26 glass-ceramics have been prepared by controlled crystallization of melt quenched bulk glasses. XRD, SEM and FTIR spectroscopy techniques were employed to characterize the crystallization process and the structural properties of the precursor glass and cor...

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Detalhes bibliográficos
Autor principal: Bagga, Ruchika (author)
Outros Autores: Achanta, Venu Gopal (author), Goel, Ashutosh (author), Ferreira, Jose M. F. (author), Singh, Narinder Pal (author), Singh, Davinder Paul (author), Contini, Vittoria (author), Falconieri, Mauro (author), Sharma, Gopi (author)
Formato: article
Idioma:eng
Publicado em: 1000
Assuntos:
STRUCTURAL INVESTIGATIONS
OXYFLUORIDE GLASSES
FLUORIDE GLASSES
TRANSPARENT
PHOSPHORS
IONS
BLUE
AIR
PHOTOLUMINESCENCE
SPECTROSCOPY
Texto completo:http://hdl.handle.net/10773/20701
País:Portugal
Oai:oai:ria.ua.pt:10773/20701
Descrição
Resumo:Eu-doped nanocrystalline NaAlSiO4/NaY9Si6O26 glass-ceramics have been prepared by controlled crystallization of melt quenched bulk glasses. XRD, SEM and FTIR spectroscopy techniques were employed to characterize the crystallization process and the structural properties of the precursor glass and corresponding glass-ceramics. The formation of divalent europium (Eu2+) from Eu3+ ions during high temperature synthesis under ambient atmosphere was analyzed by photoluminescence spectroscopy and is discussed using the optical basicity model. The observed luminescence properties of Eu: NaY9Si6O26 are compared with that of Eu: beta-PbF2 nanocrystals and their marked differences are discussed. (C) 2013 Elsevier B.V. All rights reserved.

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