Effect of Heat Treatment on Grain Growth of Magnetic Nanocrystalline Hydroxyapatite Powder

Nanocrystalline Magnetic Hydroxyapatite (MHAp) was synthesized through co-precipitation method and the subsequent heat treatment. Phase analysis, particle morphology, chemical bonding, and magnetic properties were studied using XRD, FESEM, FTIR, and VSM, respectively. The XRD results showed that MHAp was formed by heat treatment at 1100 °C. The samples heat-treated at 500 and 1100 °C incorporated a plate-like morphology with a mean crystallite size of 11.7 and 59.9 nm, respectively. In addition, the VSM results indicated that the synthesized MHAp was characterized by magnetic features after heat treatment. According to the findings in this study, the coercive field (Hc), saturation magnetization (Ms), and magnetism stayed (Mr) were 0.175 kOe, 0.00147, and 0.02615 emug-1, respectively, in -10 to 10 kOe  magnetic field. The growth kinetics of the MHAp was alo studied. According to the results, the growth activation energies for low and high temperatures were 45.51 and 67.33 kJ/mol, respectively. Owing to several properties already proven, the MHAp powder was successfully synthesized.