Authors: Yusong Pan Dangsheng Xiong
Publish Date: 2009/11/03
Volume: 19, Issue: 7, Pages: 1037-1042
Abstract
Natural biological hard tissues are biocomposites of proteins and hydroxyapatite HA with superior strength Nanometer scale HAp is the key material to manufacture bone substitute In this work nanosized HA particles were synthesized by a wet method using orthophosphoric acid and calcium hydroxide as raw materials The prepared nanocrystalline HAp was characterized for its phase purity and nanoscale morphological structure by XRD TEM and FTIR The influences of heat treatment temperature and dispersant on the properties of HAp were also investigated The results indicated that nanoparticles were pure singlephase HAp with a diameter of 2570 nm and length of 50180 nm depending on heat treatment temperature The morphology and crystallite size of HAp change with heat treatment temperature After heat treating the crystallinity of these nanoparticles increased and its morphology transformed from needlelike to spherelike structure The dispersant is beneficial to prevent the growth of HA particles and provide a uniform particle size distribution Moreover the HAp tends to form small agglomerates in the absence of dispersant
Keywords: