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Sintering Behavior of 45S5 Bioglass®

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Abstract:

In this study, we report on the effect of Bioglass® structural transformations on its sintering behaviour. In a previous paper, we showed that while heating up to 1000°C, five successive transformations occur: glassy transition, phase separation, two crystallization processes and a second glassy transition. The sintering of the material exhibits two main shrinkage stages associated to the two glassy transitions at 550°C and 850°C. At 580°C, the glass-in-glass phase separation induces a decrease of the sintering rate immediately followed by the crystallisation of the major phase Na2CaSi2O6 between 600 and 700°C, from the surface to the bulk of the particles. A completed inhibition of sintering takes place followed by a minor shrinkage due to volume crystallization. A plateau is observed until the second glassy transition.

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Periodical:

Key Engineering Materials (Volumes 361-363)

Pages:

265-268

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.361-363.265

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Online since:

November 2007

Authors:

Leila Lefebvre, Laurent Gremillard, Jérôme Chevalier, Didier Bernache-Assollant

Keywords:

Bioactive Glass, Sintering, Structural Transformation

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© 2008 Trans Tech Publications Ltd. All Rights Reserved

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