Synthesis and thermoluminescence properties of doped nanostructured aluminium oxide

✍ Scribed by J.F.S. Bitencourt; S.H. Tatumi

• Publisher: Elsevier
• Year: 2009
• Tongue: English
• Weight: 504 KB
• Volume: 2
• Category: Article
• ISSN: 1875-3892
• DOI: 10.1016/j.phpro.2009.07.036

✦ Synopsis

Al 2 O 3 : Mg were obtained using polymer calcination method, with five different concentrations of magnesium. ICP-AES analysis showed the magnesium concentrations to be: 0.47, 0.88, 1.33, 2.61 and 3.36 mol%. Scanning Electronic Microscopy (SEM) indicated the occurrence of -Al 2 O 3 crystals surface and so did the Transmission Electronic Microscopy (TEM). The composition of this layer was found to be magnesium spinel (MgAl 2 O 4 ) by Electron-beam diffraction, and according to the present results, it is related to the -rays irradiated aliquots in the VIS and the near-UV regions. Theoretical deconvolution of experimental data using the Second Order Kinetics model originated into four TL emission peaks at 190, 280, 340 and 430ºC.