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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Optical and structural properties of Mn2+ doped PbGeO3-SbPO4 glasses and glass-ceramics

Texto completo
Autor(es):
Volpi, V. [1] ; Montesso, M. [1, 2] ; Ribeiro, S. J. L. [2] ; Viali, W. R. [1] ; Magon, C. J. [3] ; Silva, I. D. A. [3] ; Donoso, J. P. [3] ; Nalin, M. [1, 2]
Número total de Autores: 8
Afiliação do(s) autor(es):
[1] Univ Fed Sao Carlos, Dept Chem, BR-13560 Sao Carlos, SP - Brazil
[2] Sao Paulo State Univ, Inst Chem, Araraquara, SP - Brazil
[3] Univ Sao Paulo, Inst Phys, Sao Carlos, SP - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: Journal of Non-Crystalline Solids; v. 431, n. SI, p. 135-139, JAN 1 2016.
Citações Web of Science: 5
Resumo

This paper shows the study of optical and structural properties of SbPO4-PbGeO3-MnCl2 glass and glass-ceramics. Glass was prepared by melting-quenching methodology while the glass ceramic was obtained by controlled thermal treatment of the glass. The UV-Vis results show that the glass presents only Mn2+ species, but, the thermal treatment leads to oxidation of Mn2+ to Mn3+ species, what was evidenced by an absorption band in the visible range. High resolution transmission electron microscopy shows the presence of nanocrystalline phases of Mn2O3 and PbGeO3 confirming the formation of a glass-ceramic Electron paramagnetic resonance measurements suggest that manganese ions occupy only one environment in the glass. On the other hand, for glass-ceramic at least three different structural sites were identified by simulation of the EPR signal. (C) 2015 Elsevier B.V. All rights reserved. (AU)

Processo FAPESP: 13/07793-6 - CEPIV - Centro de Ensino, Pesquisa e Inovação em Vidros
Beneficiário:Edgar Dutra Zanotto
Linha de fomento: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs