Co nanoparticle effects on the thermoluminescent signal induced by UV and gamma radiation in ZrO2 powders
Por:
Villa-Sanchez, G, Mendoza-Anaya, D, Fernandez-Garcia, ME, Escobar-Alarcon, L, Olea-Mejia, O, Gonzalez-Martinez, PR
Publicada:
1 may 2014
Resumen:
Zirconia powders, both pure and doped with Co nanoparticles were prepared by the sol-gel method followed by thermal treatment at 1000 degrees C. The morphological and crystallographic characteristics were studied by scanning and transmission electron microscopy, X-ray diffraction and the Rietveld refinements method. Analysis of the thermoluminescent (TL) signal induced by UV and gamma radiation was also conducted. According to the results, Co nanoparticles have a strong influence on the growth of ZrO2 particles and favor the formation of monoclinic zirconia. Moreover, an important influence of the added Co nanoparticles was observed on the position of the TL peaks of ZrO2, inducing a shift in the luminescence towards higher temperatures as well as the presence of more TL peaks at higher temperatures. (C) 2014 Elsevier B.V. All rights reserved.
Filiaciones:
Olea-Mejia, O:
Univ Autonoma Estado Mexico, Fac Quim, CC1QS, UNAM, Toluca 50200, Mexico
|