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Sintering behaviour of 45S5 bioactive glass

Paper ID Volume ID Publish Year Pages File Format Full-Text
1763 90 2008 10 PDF Available
Title
Sintering behaviour of 45S5 bioactive glass
Abstract

In this study, we report on the effect of Bioglass® structural transformations on its sintering behaviour. While heating up to 1000 °C, five successive transformations occur: glass transition, glass-in-glass phase separation, two crystallization processes and a second glass transition. The sintering of the material exhibits two main shrinkage stages associated with the two glass transitions at 550 and 850 °C. At 580 °C, the glass-in-glass phase separation induces a decrease in the sintering rate immediately followed by the major crystalline phase crystallization (Na2CaSi2O6) between 600 and 700 °C, from the surface to the bulk of the particles. A complete inhibition of sintering takes place followed by a minor shrinkage effect due to crystallization. A plateau is then observed until the second glass transition temperature is reached. A modification of Frenkel’s model allows the determination of the glass-in-glass phase separation kinetics and the identification of the structural transformations effects on sintering behaviour.

Keywords
Sintering; Phase transformations; Non-metallic glasses (silicates); Biomaterials; Porous material
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Publisher
Database: Elsevier - ScienceDirect
Journal: Acta Biomaterialia - Volume 4, Issue 6, November 2008, Pages 1894–1903
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us