Article ID Journal Published Year Pages File Type
1474769 Journal of the European Ceramic Society 2010 6 Pages PDF
Abstract

The structure of glasses with composition x TiO2·(65 − x) P2O5·35 CaO (x = 0–30 mol%) has been studied and their glass transition temperature, Raman and NMR spectra have been analysed.For TiO2-free glass two phosphate species have been identified as Q2 and Q3. Increasing TiO2 content in glass compositions results in the disappearance of the Q3 and Q2 species and in the formation of, mainly, pyrophosphate structure, Q1.In calcium titanophosphate glass with higher TiO2 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 TiO2, 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.

Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
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