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Structure and properties of bioactive eutectic glasses based on the Ca3(PO4)2–CaSiO3–CaMg(SiO3)2 system

Paper ID Volume ID Publish Year Pages File Format Full-Text
1484 84 2012 10 PDF Available
Title
Structure and properties of bioactive eutectic glasses based on the Ca3(PO4)2–CaSiO3–CaMg(SiO3)2 system
Abstract

Taking into account the phase equilibrium relationships within the Ca3(PO4)2–CaSiO3–CaMg(SiO3)2 ternary system, three bioactive glasses with a eutectic composition and analogous amounts of Ca3(PO4)2 (∼40 wt.%) have been prepared. The structure of the glasses was investigated by 31P and 29Si magic angle spinning nuclear magnetic resonance (MAS-NMR) spectroscopy. The glasses exhibited thermal expansion coefficients (50–600 °C) of 11.8–13.3 × 10−6 °C−1, a glass transition temperature of 790–720 °C and a softening temperature of 811–750 °C. The mechanical properties of the glasses were as follows: bending strength ∼100 MPa, Young’s modulus 94–83 GPa, Vickers microhardness 7.1–4.1 GPa and toughness 0.8 MPa m1/2. The bioactive properties were discussed in terms of their structure deduced by MAS-NMR spectroscopy and the field strength of the network modifiers (Mg2+ and Ca2+). A knowledge of the glass structure was important in predicting its bioactivity.

Keywords
Biomedical applications; Magic angle spinning nuclear magnetic resonance spectroscopy; Glass; Mechanical properties; Thermal properties
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Structure and properties of bioactive eutectic glasses based on the Ca3(PO4)2–CaSiO3–CaMg(SiO3)2 system
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Publisher
Database: Elsevier - ScienceDirect
Journal: Acta Biomaterialia - Volume 8, Issue 2, February 2012, Pages 820–829
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