Characteristics of hydroxyapatite from buffalo bone waste synthesized by precipitation method

Abstract

Hydroxyapatite (HA), Ca10(PO4)6(OH)2, is the most widely used ceramic biomaterials. It is a mineral found in natural teeth, bone and hard tissue. In this paper, we present a synthesis and characterization for obtaining HA by wet precipitation. This study mainly focuses on the use of bio-waste materials, i.e., buffalo bones to obtain HA. In order to synthesized HA from buffalo bones, we use Ca(OH)2, H20 and H3PO4 as the starting precursors. The material was sintered at temperatures of 650 °C, 850 °C, and 1050 °C for 7 hours to improve its particle size distribution. Identification of functional group using FTIR shows absoption namely at wavenumber values of 3699.20, 3787.92 and 3706.91 cm-1 which indicate hydroxyl group (OH). Phosphate band were identified by peak 1022.20 and 1118.63 cm-1 and 1215.06 to 1459.31-1cm which indicates carbonate group. Ratio of Ca/P for synthesized HA is about 1.67. XRD pattern results indicated that the synthesized buffalo bone HA closely correspond to commercial HA phase.