Preparation and Spectroscopy Characterization of Eu:MgAl2O4 Nanopowder Prepared by Modified Pechini Method
Abstract:In the present work, a modified Pechini method was employed to prepare nanostructured MgAl2O4 spinel powders doped with Eu3+ ions. The XRD analyses demonstrated that the powders were single-phase spinel nanopowders with high crystallite dispersion. The average spinel particle size was determined to be ≈15 nm for calcination at 700 °C, and ≈20 at 1000 °C. The emission and excitation spectra measured for the samples calcinated at 700 and 1000 °C demonstrated characteristic spectra of Eu3+ ions as well as were measured the emission spectra of Eu2+ ions for the samples calcinated at 700 °C. The effect of MgAl2O4 grain sizes on luminescence properties was noticed. To explain these differences a detailed analysis of luminescence spectra by the Judd–Ofelt theory has been performed.
Document Type: Research Article
Publication date: 2009-10-01
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