Abstract
In this work, the 45S5 bioactive glass was synthesized through an aqueous sol–gel method. Characteristic functional groups were evidenced by Fourier transform infrared spectroscopy, the thermal behaviour was investigated by thermogravimetric and differential thermal analysis, crystallization kinetics and phase evolution were followed by X-ray diffraction measurements. The sintering behaviour of the sol–gel derived 45S5 was then studied by dilatometry and the microstructural evolution was followed step-by-step, interrupting the thermal cycle at different temperatures. In vitro dissolution tests were performed in order to assess the degradation behaviour of sol–gel derived 45S5 samples thermally treated at different temperatures. A relevant influence of the calcination conditions (namely, dwelling time and temperature) of the as-prepared powder on the phase appearance and its sintering behaviour as well as on the porosity features, in terms of pore dimension and interconnectivity, of the fired materials was stated.
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Acknowledgments
The Authors wish to acknowledge Dr. S. Antonaroli, Chemical Science and Technology Department-University of Rome “Tor Vergata”, Rome-Italy, for FT-IR facilities.
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Dedicated to Professor Gualtiero Gusmano in occasion of his 70th birthday.
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Cacciotti, I., Lombardi, M., Bianco, A. et al. Sol–gel derived 45S5 bioglass: synthesis, microstructural evolution and thermal behaviour. J Mater Sci: Mater Med 23, 1849–1866 (2012). https://doi.org/10.1007/s10856-012-4667-6
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DOI: https://doi.org/10.1007/s10856-012-4667-6