Synthesis and Characterization of Nano Hydroxylapatite by Reaction Precipitation in Impinging Streams
Hydroxylapatite(HAP) nano-whiskers are prepared by reaction-precipitation in the submerged circulative impinging stream reactor(SCISR), with (NH4)2HPO4 and Ca(NO3)2 as the reagents; and the products are characterized by X-ray diffraction (XRD) analysis, Fourier transform infrared (FTIR) spectroscopy, Scanning electron microscopy (SEM) and Transmission electron microscopy (TEM). The results TEM measured indicate that the product prepared under typical operation conditions is average-sized 15nm and 50-70nm long. Multiply repeated experiments illustrates that, because of the excellent performance of the reactor, the preparation process can be easily controlled to yield nano rod/whisker hydroxylapatite with very narrow size distribution.
Guojun Zhang and Jessica Xu
J. Yuan et al., "Synthesis and Characterization of Nano Hydroxylapatite by Reaction Precipitation in Impinging Streams", Advanced Materials Research, Vols. 160-162, pp. 1301-1308, 2011