Preparation and Physicochemical Process of Nanosized Hydroxyapatite Powders with High Purity

Abstract

Abstract: In this paper, nano-sized hydroxyapatite powders were prepared by a sol-gel method with Ca(NO₃)₂·4H₂O and P₂O₅ ethanol solution as precursors. This process was simple without refluxing and the reactants were cheap compared
with other sol-gel methods. The morphology and the phase structure were studied by TEM, XRD, IR, and TG-DTA. The nano-sized HA powders with high quality were
prepared after the as-prepared powders were sintered at 500℃ for 2h. The results show that the mixture is composed of Ca (NO₃)₂, amorphous HA and
ester phosphate at 200, 300 and 400℃. The amount of HA increases while the amount of Ca(NO₃)₂ and ester phosphate decreases with the increase of
temperature. A small amount of β-Ca₂P₂O₇ and CaO is present at 300 and 400℃. This process is simple and appropriate to produce nano-sized HA powders in large quantities.

Key words: nano-sized hydroxyapatite powders, sol-gel method, physicochemical process

CLC Number:

TQ174

SONG Yun-Jing,WEN Shu-Lin,LI Mu-Sen,SU Qing-Cai,JIANG Qing-Hui. Preparation and Physicochemical Process of Nanosized Hydroxyapatite Powders with High Purity[J]. Journal of Inorganic Materials.

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