Abstract
The aim of this study was to investigate the sol ge l synthesis of HA/FA nanoparticles and the possible formation of TCP phase or unstoichiometric calcium deficient hydroxyapatite (CDHA) from the precursors with a Ca/P ratio of 1.62. In order to prepare the sol, the solutions of Triethyl phosphite, ammonium fluoride and calcium nitrate in ethanol were used respective ly as P, F and Ca precursors.The crystallinity, par ticle and crystallite size, powder morphology, chemical struc ture and phase analysis were investigated by SEM, X RD, FT-IR and Zeta sizer experiment. A multiphase compound containing hydroxyapatite (HA) and fluoroapatit e (FA) nanoparticles and calcium deficient hudroxyapatite (CDHA) agglomerates was obtained. The size of the crystallites estimated from XRD patterns using Scherrer equation and the crystallinity of HA phase were about 5 nm and 66% respectively. The zeta sizer ex periments for the dispersed particles in its own conditions showed an average size of 98 nm.
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