Rezumat articol ediţie STUDIA UNIVERSITATIS BABEŞ-BOLYAI

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The sol-gel route is one of the most important way to obtain bioactive glasses at room temperature. The quick alkali-mediated process diminishes the gelation time at few minutes. The SiO₂-CaO system was prepared via quick alkali-mediated sol-gel route and stabilised with thermal treatment at 600ºC and ethanol immersion process respectively. Thermal, structural and surface analyses were performed on the sample by means of differential thermal analysis (DTA/TGA), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). These results support the new method of stabilization by alcohol immersion these samples having the same properties of the calcined xerogel with an increased specific surface area and pore volume.

Keywords: sol-gel stabilization; calcination; volatile solvent repeated immersion.