ABSTRACT
Crystallisable glasses for biomedical applications have been developed in the CaO-P2O5-SiO2-Al2O3-TiO2 system. The phase evolution during heat treatment has been studied using a combination of x-ray diffraction and transmission electron microscopy with energy dispersive spectroscopy. At lower temperatures (800°C - 900°C), CaO-P2O5 rich ‘florets’ were observed. While at higher temperatures (1000°C - 1200°C) the floret structure was no longer apparent and coarsening of the nanodendrites occurred. This was accompanied by the appearance of anatase laths. At 1200°C, the TiO2 laths were present as rutile.
