UV Thermoluminescence and Phosphorescence Properties of Mg2+ and Nd3+ Doped Nanostructured Al2O3

Mg2+ and Nd3+ doped aluminium oxide samples were produced by polymer calcination method. Mg2+ doped samples did not exhibited significant fluorescence emission, using IR (LED, emission centered at 862nm) or green (Xe-lamp plus optical filter, emission centered at 520 nm) sources. Nonetheless, high t...

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Bibliographic Details
Published in:Journal of physics. Conference series 2010-11, Vol.249 (1), p.012052
Main Authors: Bitencourt, J F S, Gonçalves, K A, Tatumi, S H, Marcos, P J B
Format: Article
Language:English
Subjects:
Aluminum oxide
Emission
Fluorescence
Magnesium
Optical filters
Phosphorescence
Physics
Thermoluminescence
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Summary:Mg2+ and Nd3+ doped aluminium oxide samples were produced by polymer calcination method. Mg2+ doped samples did not exhibited significant fluorescence emission, using IR (LED, emission centered at 862nm) or green (Xe-lamp plus optical filter, emission centered at 520 nm) sources. Nonetheless, high thermostimulated luminescence was detected, with high emission peak at 190°C. A nanoscopic layer (about 50 nm width) of magnesium spinel was observed by Transmission Electronic Microscopy (TEM) for 2.61mol% doped sample; this layer can be the responsible for TL enhancement. Nd3+ doped sample exhibited low phosphorescence emission in the UV (Schott U-340) using IR source. TL peaks were detected at 185 and 265°C; the intermediary peak showed the highest emission. Occurrence of NdAl and NdAl2 structures were detected in 5 mol% doped sample and NdAl2 and NdAl4 structures in 10 mol% doped sample.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/249/1/012052