Preparation and Bio-mineralization in vitro of the Sol-Gel Derived Bioactive Glass Fiber

The bioactive glass fibers in the system CaO-P_2O_5-SiO_2 were prepared by the sol-gel process.The composition and microstructure of the sol-gel derived bioactive glass fibers before and after immersion in the simulated body fluid(SBF)were investigated by inverted phase microscope,SEM and FTIR techniques.The mechanism of the calcium phosphates micro-crystals growth was discussed from the view of the crystallography.The results show that the bioactive glass fibers are discontinuous short fibers,and the short sol-gel bioactive glass fibers have a satisfactory shape and a high bioactivity owing to the rapid formation of downy A-type hydroxyl-carbonate-apatite(HCA)on the surface of bioactive glass fibers in SBF.