Effect of the temperature and sintering time on the thermal, structural, morphological, and vibrational properties of hydroxyapatite derived from pig bone

This paper focuses in the study of the effect of the temperature and sintering time on structural, morphological, thermal, and vibrational properties of hydroxyapatite obtained from pig bone (BHA). A three-step process was used to get BHA: hydrothermal cleaning, calcination, and cooling. Samples were calcined and cooled inside the furnace under atmosphere air. The samples were calcined at 600 and 1000 °C and sintered at 1, 7, 20, 50 h and studied accordingly. XRD and Raman studies showed an improvement in the crystalline quality as a function of the sintering time, while the samples calcined at 1000 °C did not exhibit structural changes as a function of the sintering time. The presence of magnesium oxide (MgO) was confirmed by XRD and micro EDS analysis as a result of the temperature treatment because this compound was not found in the samples calcined at 600 °C. The crystalline quality of these samples was studied using XRD and Raman spectroscopy.