A comparison between neodymium doped alumina samples obtained by Pechini and sol-gel methods using thermo-stimulated luminescence and SEM


Autoria(s): BITENCOURT, J. F. S.; VENTIERI, A.; GONCALVES, K. A.; PIRES, E. L.; MITTANI, J. C.; TATUMI, S. H.
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

18/10/2012

18/10/2012

2010

Resumo

Neodymium doped and undoped aluminum oxide samples were obtained using two different techniques: Pechini and sol-gel. Fine grained powders were produced using both procedures, which were analyzed using Scanning Electron Microscopy (SEM) and Thermo-Stimulated Luminescence (TSL). Results showed that neodymium ions incorporation is responsible for the creation of two new TSL peaks (125 and 265 degrees C) and, also, for the enhancement of the intrinsic TSL peak at 190 degrees C. An explanation was proposed for these observations. SEM gave the dimensions of the clusters produced by each method, showing that those obtained by Pechini are smaller than the ones produced by sol-gel; it can also explain the higher emission supplied by the first one. (C) 2010 Elsevier B.V. All rights reserved.

Identificador

JOURNAL OF NON-CRYSTALLINE SOLIDS, v.356, n.52-54, Special Issue, p.2956-2959, 2010

0022-3093

http://producao.usp.br/handle/BDPI/17932

10.1016/j.jnoncrysol.2010.03.047

http://dx.doi.org/10.1016/j.jnoncrysol.2010.03.047

Idioma(s)

eng

Publicador

ELSEVIER SCIENCE BV

Relação

Journal of Non-crystalline Solids

Direitos

restrictedAccess

Copyright ELSEVIER SCIENCE BV

Palavras-Chave #Thermo-stimulated luminescence #Ionizing radiation #Pechini #Sol-gel #OPTICALLY STIMULATED LUMINESCENCE #ALPHA-AL2O3-C #CRYSTALS #Materials Science, Ceramics #Materials Science, Multidisciplinary
Tipo

article

proceedings paper

publishedVersion