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ZBLAN glasses with the composition (in mol%) of (100 − x)(53 ZrF 4 +19 BaF 2 + 5LaF 3 +3AlF 3 +20NaF)+xTiO 2 (x = 0, 1.0 and 2.0 mol%) were prepared using a conventional melting technique in dry nitrogen atmosphere. The thermal stability, glass-forming ability, and crystallization kinetics of the ZBLAN system as a function of the TiO 2 concentrations were investigated by Differential Scanning Calorimetry (DSC). Also, the crystalline phases were determined by X-ray Diffraction (XRD). Our study indicates that adding TiO 2 in a fluoride system improves the thermal parameters of the glass, which is interesting for applications as optical fiber.

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Bioactive glass (BG) particles with nominal composition 60SiO 2 -36CaO-4P 2 O 5 (mol%) were prepared by the sol-gel emulsion method. The thermal parameters, morphology, and phase composition were characterized by means of thermal analysis, scanning electron microscopy, X-ray diffraction, and FT-IR absorption spectroscopy. The in vitro bioactivity of the samples was determined by immersing the samples in simulated body fluid. The findings indicated that the sol-gel emulsion method may be useful to prepare BG samples free of crystallization.