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Fabrication of Translucent Hydroxyapatite Ceramics with Different Forms by Sol-Gel Method

Author(s): LUO Hui-Tao, GUO Tai-Lin, ZHU De-Gui, ZHI Wei, DUAN Ke, ZHANG Cheng-Dong, QU Shu-Xin, WENG Jie

Journal: Journal of Inorganic Materials
ISSN 1000-324X

Volume: 28;
Issue: 8;
Start page: 804;
Date: 2013;
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Keywords: hydroxyapatite; Sol-Gel method; translucent; high compressive strength; complicated forms

In order to fabricate translucent hydroxyapatite ceramics with different forms, using micro-sized HA powders as the raw material and chitin as adhesive, the ceramic green was prepared by Sol-Gel method. Subsequently, pure HA ceramics were obtained by normal pressure sintering. Translucent HA ceramics were then fabricated via hot isostatic pressing (HIP) sintering. The Sol-Gel method is easy to obtain shaped ceramic products. The so-produced HA ceramic spheres with a good sphericity and the HA ceramic fibers with a high aspect ratio have the density of 99.1% and the average grain size of 2.2 μm. Compressive strength of translucent HA ceramic spheres is 10.2 MPa whith It is higher than that of conventionally-sintered dense and porous HA ceramic spheres (8.9 and 4.7 MPa, respectively). Results of biomimetic mineralization and cell culture show that translucent HA ceramics have good biocompatibility.
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