Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/1014
Type: Artigo de periódico
Title: Study of sodium tellurite glass using the thermally stimulated depolarization current technique (TSDC)
Author: GIEHL, J. M.
PONTUSCHKA, W. M.
BARBOSA, L. C.
BLAK, A. R.
NAVARRO, M.
COSTA, Z. M. Da
Abstract: In order to have a better understanding of the role of the structure and the defects involved in the polarization processes in an 85TeO(2)-15Na(2)O mol% glass, we used the thermally stimulated depolarization currents (TSDC technique). The TSDC of the non-irradiated sample presented a strong negative peak of current at the temperature of 340 K, preceded by a relatively weak positive peak at about 300 K. after different d.c. voltages of 1200, 1500 and 2000 V were applied. No response was obtained with 1000 V. but the peak intensity increased considerably for voltages above 1200 V. After gamma-irradiation of 25 and 50 KGy doses, a depolarization of the negative peak was observed in the sample submitted to 25 KGy, whereas for the sample irradiated with 50 KGy, six TSDC peaks appeared at regular intervals of 5 KGy, in the temperature range of 100 and 300 K. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved.
Subject: Tellurite glasses
TSDC
Gamma radiation
Country: Holanda
Editor: ELSEVIER SCIENCE BV
Citation: JOURNAL OF NON-CRYSTALLINE SOLIDS, v.357, n.6/Jul, p.1582-1586, 2011
Rights: fechado
Identifier DOI: 10.1016/j.jnoncrysol.2010.12.025
Address: http://dx.doi.org/10.1016/j.jnoncrysol.2010.12.025
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Date Issue: 2011
Appears in Collections:IFGW - Artigos e Materiais de Revistas Científicas

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