Síntese e propriedades de Bio-Vitrocerâmicas dopadas com uma fase magnética para aplicações biomédicas

Abstract

Glass-ceramics with biocompatible properties have been intensively studied for biomedical applications. The use of those materials in the medicine area allows the addition of both mechanical and biological properties that are unique to glass-ceramic systems. The objective of the present work is to study physical properties of the 45SiO2–24.5Na2O–24.5CaO–6P2O5 glass system doped with a magnetic phase, by adding a bioactive phase to the glassy matrix. The aim is to promote the formation of a glass-ceramic composite with the mechanical, chemical and physical properties of the glass-ceramic, as well as adding the characteristic properties of a magnetic phase promoted by the dopant. The synthesis of the magnetic phase used as dopant was carried out by the solid-state reaction method. The vitreous system was obtained by the rapid cooling method (quenching), while the glass-ceramics were obtained by the modified incorporation method. The obtained materials were subjected to a submersion process in glycerin, commonly used as a Simulation Body Fluid (SBF), in order to verify the formation of a hydroxyapatite layer, which serves as a link between the material and the connective tissue. The structural and optical properties were investigated by the X-ray diffraction, Raman microscopy and optical absorption techniques, respectively. The obtained results have been compared with those reported in the literature for other systems, in order to evaluate the capability of the proposed material for application in the biomedicine area.