Journal
BIOMATERIALS
Volume 22, Issue 20, Pages 2705-2712Publisher
ELSEVIER SCI LTD
DOI: 10.1016/S0142-9612(00)00257-X
Keywords
mechanochemical synthesis; nanocrystalline hydroxyapatite; CaO; CaHPO4
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Ceramic hydroxyapatite phase was triggered to occur by high-energy mechanical activation of a dry powder mixture of calcium oxide (CaO) and anhydrous calcium hydrogen phosphate (CaHPO4). A singe-phase hydroxyapatite of high crystallinity was realised by > 20h of mechanical activation without further thermal treatment at high temperatures. The resulting hydroxyapatite powder exhibits an average particle size of similar to 25 nm and a specific surface area of 76.06 m(2)/g, as measured by multi-point BET technique. It was sintered to a density of 98.20% theoretical density at 1200 C for 2 h. (C) 2001 Published by Elsevier Science Ltd.
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