Scandium fluorophosphate glasses: a structural approach
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Data
2002-12-01
Autores
Nalin, Marcelo [UNESP]
Ribeiro, SJL
Messaddeq, Younes [UNESP]
Schneider, J.
Donoso, P.
Título da Revista
ISSN da Revista
Título de Volume
Editor
Elsevier B.V.
Resumo
A systematic investigation on glass formation in the ternary system InF3-BaF2-[Sc(PO3)(3)](n) has been carried out. Scandium polyphosphate [Sc(PO3)(3)](n) has been used as a third component in order to investigate the possibilities of obtaining new stable glasses. The above long-chain polyphosphate has been prepared using a specially elaborated cryo-technique, which allowed the preparation of high-purity product. Stable ternary compositions have been obtained within the compositions range (in mol%): 5-75 InF3, 0-80% BaF2, 0-50% [Sc(PO3)(3)](n). Glasses were characterized by Differential Scanning Calorimetry, vibrational spectroscopy (Raman) and P-31 NMR. Structural features for the glass were put forward. Isolated P(O,F)4 groups or fluoroindated metaphosphate units could be identified depending on glass compositions. (C) 2002 Academie des sciences / Editions scientifiques et medicales Elsevier SAS.
Descrição
Palavras-chave
fluorophosphate, scandium polyphosphate, Raman, P-31 RMN
Como citar
Comptes Rendus Chimie. Paris Cedex 15: Editions Scientifiques Medicales Elsevier, v. 5, n. 12, p. 915-920, 2002.