EFFECTS OF INCORPORATING NATURAL MINERALS ON PRODUCTION AND BIOACTIVITY OF BIOACTIVE GLASS CERAMICS

FRANCO MATÍAS STÁBILE; CRISTINA VOLZONE

CERAMICS-SILIKáTY

INST CHEMICAL TECHNOLOGY

Lugar: Praga; Año: 2016 vol. 60 p. 188 - 194

0862-5468

Two glass-ceramics composition were produced from natural minerals. Quartzes andfeldspars were pre-selected on the basis of their purities studied by X-ray diffraction(XRD) and chemical analysis. Prepared compositions of glasses precursors were twodifferent theoretical leucite (KAlSi2O6) /Bioglass 45S5 (L/Bg) ratios. Transformations ofraw materials mixtures and glass precursors were studied by differential thermalanalyses. On the basis of thermal analysis results, glass ceramics were produced andcharacterized by XRD. Glass-ceramics were composed of two major crystallinephases, leucite and sodium calcium silicate. Bioactivity tests were performedsubmerging the glass-ceramics into simulated body fluid (SBF) for different periods (1,5 and 10 days). Bioactive behavior was monitored by XRD and scanning electronmicroscopy (SEM). Studied samples were found to be bioactive, in whichhydroxyapatite layer was developed within 5 days of contact with SBF.