Abstract
Recently nano-hydroxyapatite (nano-HA) has been used as a new biomaterial in medical and dental fields. There are many methods to synthesize the nano-HA. In the present study, the nano-HA was synthesized under various reaction conditions by a wet method using neutralization reaction of calcium hydroxide suspension and phosphoric acid solution. The physicochemical properties of the nano-HA were characterized by XRD, FTIR, TG and TEM. The XRD, FTIR and TEM results indicated that the nano-HA samples were pure and the sizes were less than 50 nm. However, all samples contained carbonate and the contents were determined to be 2-4% by TG. The crystallinity of the nano-HA increased higher at body temperature of 37°C than at lower temperature of 7-10°C.
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