UV Thermoluminescence and Phosphorescence Properties of Mg2+ and Nd3+ Doped Nanostructured Al2O3
Abstract
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.
- Publication:
-
Journal of Physics Conference Series
- Pub Date:
- November 2010
- DOI:
- 10.1088/1742-6596/249/1/012052
- Bibcode:
- 2010JPhCS.249a2052B