Structural Role of Strontium Oxide in Modified Silicate Glasses

Glasses in the system 24.5Na2O.24.5CaO.6P2O5.xSrO.(45-x)SiO2 have been studied composition region of x = 0–15 mol%. The as-prepared glasses are transparent and an amorphous network structure. On other hand, heat-treated transformed to opaque white glass-ceramic characterized by their highly crystalline Crystalline apatite (calcium phosphate, Ca3(PO4)2), wollastonite silicate, CaSiO3), strontium calcium phosphate [Ca2Sr (PO4)2) main well-formed species that played major role material bioactivity. Increasing SrO leads enhancing crystallite enhances hardness host glass matrix. change XRD spectra,31P NMR chemical shift, number upon increasing considered due modification Ca(PO3)2 involve Sr ions inducing Ca2Sr (PO4)2 one. Such play properties hardness.