Study the properties of dense Hydroxyapatite - Extract from cow bone

Abstract

In this study, natural HA were extrated from clean cow bone by treatment with NaOH and heating at high temperature before ground into fine powder. The HA powder were than mixed together with binder for several hours. Dense HA were formed in die steel mould by using uniaxially pressing method. Sample was sintered at different temperature 1150, 1200, 1250, and 1300c for several hours. The phases of specimen were identified using X-ray diffraction (XRD). The mechanical properties were analyzed using MOR testing and the microstructure was observed by scanning electron microscopy. from XRD result, natural HA shows phase of pure HA up to 1000c and modulus of rupture (MOR)result indicated that the mechanical properties of specimen increase as temperature increase. From microstructure observation using SEM, HA specimen shows initial stages of sintering process at temperature 1150c and shows changes in microstructure evolution as temperature increase up to 1300c.