Eu-doped nanocrystalline NaAlSiO4/NaY9Si 6O26 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: NaY9Si 6O26 are compared with that of Eu: β-PbF2 nanocrystals and their marked differences are discussed. © 2013 Elsevier B.V. All rights reserved.
|Titolo:||Luminescence study of mixed valence Eu-doped nanocrystalline glass-ceramics|
|Data di pubblicazione:||2013|
|Appare nelle tipologie:||1.1 Articolo in rivista|