Abstract
Nano-hydroxyapatite(nHAp) powders were prepared by chemical precipitation method using Ca(NO3)2·4H2O and (NH4)2HPO4 as raw materials and deionized water as solvent. To investigate the influence of ageing time on the preparation of nano HAp powder by changing the ageing time. And the composition and appearance of the samples were analyzed by infrared spectroscopy (FTIR), X ray diffraction (XRD) and scanning electron microscopy (SEM). With the longer ageing time, the samples gradually became sphere-like crystals and the crystallization degree were better.
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