Effects of the particle size and nucleation temperature on tellurite 20Li(2)O-80TeO(2) glass crystallization

20Li(2)O-80TeO(2) glasses were heat annealed at different temperatures between T(g) and T(x) and studied by using XRD, FTIR spectroscopy and DSC techniques to understand the crystallization kinetics in this glass matrix. The infrared band structure of this glass is similar to what was observed in gl...

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Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2006-10, Vol.434 (1-2), p.13-18
Main Authors: Idalgo, E, Araujo, E B, Yukimitu, K, Moraes, J C S, Reynoso, V C S, Carvalho, C L
Format: Article
Language:English
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Summary:20Li(2)O-80TeO(2) glasses were heat annealed at different temperatures between T(g) and T(x) and studied by using XRD, FTIR spectroscopy and DSC techniques to understand the crystallization kinetics in this glass matrix. The infrared band structure of this glass is similar to what was observed in glassy TeO(2). XRD results reveal the presence of three distinct crystalline -gamma-TeO(2), alpha-TeO(2) and Li(2)Te(2)O(5) phases during the crystallization process. This is a first report of gamma-TeO(2) phase crystallization in this glass matrix. DSC results confirm the crystallization of three distinct structures i the glass. In summary, our results suggest a crystallization hierarchy on this glass matrix since the gamma-TeO(2) and alpha-TeO(2) phases crystallization occurs before the Li(2)Te(2)O(5) phase crystallization.
ISSN:0921-5093
DOI:10.1016/j.msea.2006.07.046