Spectroscopic analysis of “MgAlON” spinel powders: influence of nitrogen content

The thermoluminescence (TL) and fluorescence spectra of magnesium aluminium oxynitride “MgAlON” and magnesium aluminate MgAl 2O 4 spinel powders have been analysed. Two broad peaks at about 100 and 300 °C appear in the TL spectra of MgAl 2O 4 and seem to be related to electron and hole release from...

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Bibliographic Details
Published in:Solid state ionics 2003-04, Vol.159 (3), p.381-388
Main Authors: Morey, O, Goeuriot, P, Grosseau, P, Guilhot, B, Benabdesselam, M, Iacconi, P
Format: Article
Language:English
Subjects:
Chemical and Process Engineering
Engineering Sciences
Fluorescence
Materials
MgAl 2O 4
MgAlON
Thermoluminescence
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Summary:The thermoluminescence (TL) and fluorescence spectra of magnesium aluminium oxynitride “MgAlON” and magnesium aluminate MgAl 2O 4 spinel powders have been analysed. Two broad peaks at about 100 and 300 °C appear in the TL spectra of MgAl 2O 4 and seem to be related to electron and hole release from [Al Mg ] and [Mg Al′] traps, respectively. The intensity of each peak strongly depends on the nature of the annealing atmosphere (neutral, oxidizing or reducing). TL spectral analyses have shown the presence of two intense emissions at 520 and 690 nm attributed to the Mn 2+ and Cr 3+ emitting centers, respectively. A study on MgAl 2O 4 is used as a reference for MgAlON powders, which can be considered as a solid solution derived from magnesium aluminate. Disturbance in the emission spectrum of Cr 3+ is clearly observed with the nitrogen/oxygen substitution.
ISSN:0167-2738
1872-7689
DOI:10.1016/S0167-2738(02)00918-9