Sintering Behavior of 45S5 Bioglass®

Abstract:

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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.

Info:

Periodical:

Key Engineering Materials (Volumes 361-363)

Main Theme:

Edited by:

Guy Daculsi and Pierre Layrolle

Pages:

265-268

DOI:

10.4028/www.scientific.net/KEM.361-363.265

Citation:

L. Lefebvre et al., "Sintering Behavior of 45S5 Bioglass®", Key Engineering Materials, Vols. 361-363, pp. 265-268, 2008

Online since:

November 2007

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Price:

$35.00

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