Bioactivity Behavior of Multicomponent (P2O5 –B2O3- SiO2-Na2O-CaF2) Glasses Doped with ZnO, CuO or Ag2O and their Glass-Ceramics

Glasses composed of multi-oxides (P 2 O 5 –B 2 O 3 –SiO 2 together with Na 2 O and CaF 2 and doped with either ZnO, CuO or Ag 2 O were prepared by melting- annealing technique controlled thermal heat–treatment process through two–step regime was carried for samples from the parent glasses to convert them to their corresponding glass–ceramic derivatives. Characterization of the bioactivity behavior of glass–ceramics was analyzed by FTIR spectroscopy and SEM investigations. The IR spectra for samples before and after immersion in phosphate solution reveal interfering or mixed PO 4 , BO 3 , BO 4 and SiO 4 groups reflecting their characteristic vibrational peaks which are located mostly within the region 400–1700 cm −1 . SEM investigations were carried out for the surfaces of the glass–ceramics before and after immersion in phosphate solution. X-ray diffraction data for the glass–ceramic reveal crystalline phases formed. SEM after immersion, reveals nodular or rounded–shaped microcrystals which are characteristic for hydroxyapatite and combining the generation of the far–IR splitted band due to the same phase.