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Bioactive glasses belonging to the 60SiO₂-36CaO-4P₂O₅ (mol %) system have been prepared by sol-gel method under various conditions, using different molar ratios of HCl:TEOS and replacing H₂O with H₂O₂. The obtained bioglasses were characterized by X-ray powder diffraction, BET analysis and Raman spectroscopy. Depending on synthesis conditions, crystalline Ca₂SiO₄ or hydroxyapatite phases are developed in some samples. At the same time, the preparation conditions influence the specific surface area and the connectivity of silica units in the structural network of these samples.

Keywords: bioactive glasses; sol-gel; XRD; BET; Raman spectroscopy.