STEM and EDXS Characterization of Physico‐chemical Reactions at the Periphery of Bioactive Glass Particles in Contact with Biological Fluids

Abstract

Al layer compared to the center of the glass particles. Then, an apatite (Ca-P) layer starts to built up and grows with time after immersion into biological fluids. The Ca/P atomic ratio increases with time from 1 to 1.6. A thick Ca-P rich layer was formed after 28 days. The Ca-P layer appeared to be generated by calcium and phosphate ions diffusing through the Si-Al layer, which contain at least traces of these ions.