Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 22    Special 1    October 2012

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Fabrication of hydroxyapatite microspheres with poor crystallinity using a novel flame-drying method
XIAO Gui-yong1, 2, LÜ Yu-peng1, 2, ZHU Rui-fu1, 2, XU Wen-hua1, 2, JIAO Yan1, 2

1. Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education,
Shandong University, Ji’nan 250061, China;
2. School of Materials Science and Engineering, Shandong University, Ji’nan 250061, China

Abstract:Three kinds of hydroxyapatite (HA) microspheres were prepared using a flame-drying method. The morphologies and selected area diffraction of HA slurries were determined by TEM. The phase composition, and morphologies were studied by TEM, X-ray diffractometer (XRD), scanning electron microscope (microstructure, SEM), respectively. The TEM result shows that the slurries are composed of nano-particle HA. With the aging time of HA slurry prolonging, the morphology of HA particle changes from spherical ACP (amorphous calcium phosphate) to rod-like acicular nano-crystal morphology. Low temperature can also cause the crystallinity degree of HA slurry decrease obviously. The XRD result shows that the crystallinity of HA microspheres prepared from three kinds of HA slurry is consistent with its corresponding slurry. The SEM result shows that the sphericity of the microspheres prepared by pure HA slurry without ammonia water is the best among three kinds of microspheres, then the HA slurry containing ammonia solution forms the hollow microspheres with open pore, and ice-water mixture flurry.

 

Key words: hydroxyapatite; poor crystallinity; porous microspheres; flame-drying

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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