Synthesis and Thermoluminescence Properties of Mg2+ Doped Nanostructured Aluminium Oxide

被引：10

作者：

Bitencourt, J. F. S. ^{[1
]}

Tatumi, S. H. ^{[1
]}

机构：

[1] Univ Sao Paulo, Dept Engn Eletr, BR-05508900 Sao Paulo, Brazil

来源：

2008 INTERNATIONAL CONFERENCE ON LUMINESCENCE AND OPTICAL SPECTROSCOPY OF CONDENSED MATTER | 2009年 / 2卷 / 02期

关键词：

Aluminium oxide; thermoluminescence properties; dosimetry; magnesium spinel; TEM; SEM; ALPHA-AL2O3;

D O I：

10.1016/j.phpro.2009.07.036

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Samples of alpha-Al2O3: 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 a nanometric layer over the alpha-Al2O3 crystals surface and so did the Transmission Electronic Microscopy (TEM). The composition of this layer was found to be magnesium spinel (MgAl2O4) by Electron-beam diffraction, and according to the present results, it is related to the improvement of thermoluminescence (TL) emission efficiency, for gamma-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 430 degrees C.

引用

页码：501 / 514

页数：14

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