title: An investigation of the chemical synthesis and high-temperature sintering behaviour of calcium hydroxyapatite (HA) and tricalcium phosphate (TCP) bioceramics.
abstract: The experimental conditions for the synthesis of sub-micrometre, spherical particles of calcium hydroxyapatite [Ca10(PO4)6(OH)2] (HA) and tricalcium phosphate [Ca3(PO4)2] (TCP) are investigated through chemical coprecipitation from the aqueous solutions of calcium nitrate and di-ammonium hydrogen phosphate salts. The precipitation process employed was also found to be suitable for the production of sub-micrometre HA/TCP composite powders in situ. The synthesized pure HA and TCP powders were found to be stable even at 1300 degrees C in air for prolonged heating times. Bioceramic sample characterization was achieved by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), and density and surface area measurements. Crystallographic analyses of HA powders were performed by the Rietveld method on the powder XRD data.
authors.affiliation: Department of Metallurgical and Materials Engineering, Middle East Technical University, Ankara, Turkey.
authors.forename: A
authors.initials: A
authors.lastname: Cüneyt Taş
authors.forename: F
authors.initials: F
authors.lastname: Korkusuz
authors.forename: M
authors.initials: M
authors.lastname: Timuçin
authors.forename: N
authors.initials: N
authors.lastname: Akkaş