Structural and Magnetic Studies on Nano-crystalline Biocompatible Glass/Glass-ceramic

摘要

Ferrimagnetic glass-ceramics have been derived from bulk CaO-P_(2)O_(5)-SiO_(2)-Fe_(2)O_(3) glass system containing different additives like MgO, ZnO etc. by controlled crystallization. Phase formation and magnetic behaviour of glass-ceramics samples have been studied using XRD and SQUID magnetometer. The microstructure as seen by scanning electron microscopy exhibits nano sized particles. Nanocrystalline hematite and magnetite along with bone mineral phases constitute the major crystalline phases. Saturation magnetization increases with increase in amount of iron oxide since the volume fraction of magnetite has also increased. Addition of ZnO leads to increase in the saturation magnetization. In vitro response in simulated body fluid shows the formation of hydroxyapatite like layer implying the bioactive nature of the samples.