title: Sintering behaviour of hydroxyapatite bioceramics.
abstract: The sintering behaviour of a commercial HA and synthesized HA was investigated over the temperature range of 700 degrees C to 1400 degrees C in terms of phase stability, bulk density, Young's modulus and Vickers hardness. In the present research, a wet chemical precipitation reaction was successfully employed to synthesize a submicron, highly crystalline, high purity and single phase stoichiometric HA powder that is highly sinteractive particularly at low temperature regimes below 1100 degrees C. It has been revealed that the sinterability of the synthesized HA was significantly greater than that of the commercial HA. The temperature for the onset of sintering and the temperature required to achieve densities above 98% of theoretical value were approximately 150 degrees C lower for the synthesized HA than the equivalent commercial HA. Nevertheless, decomposition of HA phase upon sintering was not observed in the present work for both powders.
authors.affiliation: Ceramics Technology Laboratory, COE, University Tenaga Nasional, Km-7, Jalan Kajang-Puchong, 43009 Kajang, Selangor, Malaysia.
authors.forename: S
authors.initials: S
authors.lastname: Ramesh
authors.forename: C Y
authors.initials: CY
authors.lastname: Tan
authors.forename: K L
authors.initials: KL
authors.lastname: Aw
authors.forename: W H
authors.initials: WH
authors.lastname: Yeo
authors.forename: M
authors.initials: M
authors.lastname: Hamdi
authors.forename: I
authors.initials: I
authors.lastname: Sopyan
authors.forename: W D
authors.initials: WD
authors.lastname: Teng
mesh_terms: D001672:Biocompatible Materials / Q000138:chemical synthesis / Q000737:chemistry; D018786:Bone Substitutes; D002516:Ceramics / Q000737:chemistry*; D003460:Crystallization; D017886:Durapatite / Q000138:chemical synthesis / Q000737:chemistry*; D006244:Hardness; D006801:Humans; D008422:Materials Testing; D044367:Phase Transition; D010865:Pilot Projects; D011208:Powders / Q000138:chemical synthesis / Q000737:chemistry*; D013499:Surface Properties; D013718:Tensile Strength
chemical_list: D001672:Biocompatible Materials; D018786:Bone Substitutes; D011208:Powders; D017886:Durapatite