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Structural characterization of TiO2–P2O5–CaO glasses by spectroscopy by A.M.B. Silva; R.N. Correia; J.M.M. Oliveira; M.H.V. Fernandes is a Materials Science article available to read on EtoBox.

What is Structural characterization of TiO2–P2O5–CaO glasses by spectroscopy about?

The structure of glasses with composition x TiO 2 •(65x) P 2 O 5 •35 CaO (x = 0-30 mol%) has been studied and their glass transition temperature, Raman and NMR spectra have been analysed. For TiO 2 -free glass two phosphate species have been identified as Q 2 and Q 3 . Increasing TiO 2 content in glass compositions results in the disappearance of the Q 3 and Q 2 species and in the formation of, mainly, pyrophosphate structure, Q 1 . In calcium titanophosphate glass with higher TiO 2 content the structure consists of a distorted Ti octahedral linked to pyrophosphate unit through P-O-Ti bonds. In these glass series the structural cohesion increases with TiO 2 , although a depolymerization in the original P-O-P network occurs. The study of these glasses and the understanding of their structural characteristics can give a valuable contribution for the clarification of their degradation behaviour namely in biological environments.

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Author

A.M.B. Silva; R.N. Correia; J.M.M. Oliveira; M.H.V. Fernandes

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0955-2219)

Published

2010

Language

EN

Field

Materials Science (Physical Sciences)