Hydrolysing characterisation of R2O-CaO-P2O5 based glasses

The hydrolysing characterisation of R2O-CaO-P2O5 based glasses has been stu died The degradation of bioglass ceramics is closely related to the hydroly sing characterisation of the glass in ceramics A powder method was used to test the hydrolysing characterisation. The structure was analysed by infrar ed spectra. The effects of shaped method's and the content of alkali oxide (R2O) on the structure and hydrolysing characterisation Ir,ere studied. It has been found that the hydrolysing characterisation relates to the forming method, R2O content and strength of R-O bond Results show that the hydroly sis rate of water quenched glass (shaped and cooled in water) is higher tha n air quenched glasses (shaped and cooled in air). When R2O content is low, the hydrolysis rate rises with increasing R2O (the increasing order is Li < Na+ < K+). When the R2O content is high the hydrolysis rate rises if the content of Na2O or K2O rises (the increasing order is K+ < Na+) while the hydrolysing rate of Li2O glass decreases. This research work could be benef icial for designing biodegradable glass ceramics.