Nanohydroxyapatite prepared from non-toxic organic Ca~(2+) compounds by precipitation in aqueous solution

摘要

Nanocrystalline hydroxyapatites were prepared by the precipitation method using a water soluble Ca~(2+) organic compounds and (NH_4)_2HPO_4. The fine nanohydroxyapatites had spherical, needle-like or mixed morphology and specific areas around 150 m~2/g. The nanocrystalline powders differed by thermal stability and they were transformed to bi- or three-phasic systems with hydroxyapatite, βTCP andαaTCP phases after annealing at 1000 ℃.