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Trans Tech Publications, Advanced Materials Research, (910), p. 23-26, 2014

DOI: 10.4028/www.scientific.net/amr.910.23

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Preparation and Properties of Porous Hydroxyapatite Ceramics by Three Dimensional Stacking with Homogeneous Fibers

Journal article published in 2014 by Lie Feng Liang, Jun Jie Chen, Yong He, Dai Yang Li
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

A new technique to prepare macroporous hydroxyapatite (HA) scaffolds was introduced. Porous HA ceramics were prepared by sol-gel method from chitin dissolved in dimethylacetylamide (DMAc) / lithium chloride (LiCl) solvent, three dimensional stacking with HA gel fibers and pore agent. The blocks dried were heated to optimum sintering temperature of 1280°C. The porous HA ceramics reinforced by homogeneous fibers, with interconnected pores and high porosity and pore-diameter were obtained, whilst improving mechanical strength. Sintered ceramics were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). XRD analysis confirmed that the crystal structure remained HA. SEM showed the samples presented a highly interconnected porous reticulate structure with average pore size ranging from 340μm to 450μm. The porosity was varied from 61% to 83%. The maximum compressive strength of HA ceramic was 3.4MPa.The mechanical strength of samples was improved with addition of homogeneous fibers.