title: Sol-gel derived 45S5 bioglass: synthesis, microstructural evolution and thermal behaviour.
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.
authors.affiliation: Department of Industrial Engineering, INSTM RU Roma Tor Vergata, University of Rome Tor Vergata, Rome, Italy. ilaria.cacciotti@uniroma2.it
authors.forename: Ilaria
authors.initials: I
authors.lastname: Cacciotti
authors.forename: Mariangela
authors.initials: M
authors.lastname: Lombardi
authors.forename: Alessandra
authors.initials: A
authors.lastname: Bianco
authors.forename: Antonio
authors.initials: A
authors.lastname: Ravaglioli
authors.forename: Laura
authors.initials: L
authors.lastname: Montanaro
mesh_terms: D002516:Ceramics / Q000138:chemical synthesis*; D003460:Crystallization / Q000379:methods*; D005898:Glass; D006244:Hardness; D006358:Hot Temperature; D008422:Materials Testing; D044367:Phase Transition; D014867:Water / Q000737:chemistry*
chemical_list: C425330:bioactive glass 45S5; D014867:Water