Preparation of hydroxyapatite fibers by the homogeneous precipitation method

Abstract

This paper discussed the preparing process of hydroxyapatite fibers which were widely used as reinformcement for biomedical materials by homogeneous precipitation method. The needle-like hydroxyapatite crystals were synthesized in an aqueous system. They were transferred from precursors-dicalcium phosphate anhydrate and octacalcium phosphate crystals. The reaction conditions were well controlled in order to obtain crystals in given morphology. The products were characterized by X-ray powder diffractometry (XRD), scanning electron microscopy (SEM) and infrared spectroscopy(IR). They were verified to be hydroxyapatite crystals with needle-like in shape.

Keywords

hydroxyapatite fibers / homogeneous precipitation / precursor

References

[1] Hideki Aoki. Science and Medical Applications of Hydroxyapatite.Japanese Association of Apatite Science, 1992:137–190

[2] Readey M J. Formation and Sintering Characteristics of Aluminum Borate Whiskers. J. Am. Ceram. Soc., 1992, 75(12): 3452-56.

[3] Wu M, Messing G L. SiC-Whisker-Reinforced Cellular SiO₂ Composites. J. Am. Soc., 1990, 73(11): 3497-99.

[4] Wojciech L. Suchanek and Masahiro Yoshimura. Preparaton of Fibrous, Porous Hydroxyapatite Ceramics from Hydroxyapatite Whiskers. J. Am. Ceram. Soc., 1998, 81(3): 765-67.

[5] Choueka J, Charret J L, Alexander H, . Effect of Annealing Temperature on the Degradation of Reinforcing Fibers for Absorbable Implants. J. Biomed. Mater. Res., 1995, 29: 1309-15.

[6] Seita Koudan.Manufacture of Hydroxyapatite Whisker. JP05-17110, 1993

[7] Kandori K, Horigami N, Yasukawa A, . Texture and Formation Mechanism of Fibrous Calcium Hydroxyapatite Particles Prepared by Decomposition of Calcium-EDTA Chelates. J. Am. Ceram. Soc., 1997, 80(5): 1157-64.

[8] Kamiya K, Yoko T, Tanaka K, . Growth of Fibrous Hydroxyapatite in the Gel System. J. of Materials Science, 1989, 24: 827-32.

[9] Tanahashi M, Kamiya K, Suzuki T, . Fibrous Hydroxyapatite Growth in the Gel System: Effects of pH of the Solution on the Growth Rate and Morphology. J. Mater. Sci.: Mater. Med., 1992, 3(1): 48-53.

[10] Kinoshita M, Itatani K, Nakamura S, . Preparation and Morphology of Carbonate-Containing Hydroxyapatite by Homogeneous and Hydrothermal Methods. Gypsum and Lime, 1990, 227: 19-27.

[11] Ito Atsuo, Nakamura Satoshi, Aoki Hideki, . Hydrothermal Growth of Carbonate-containing Hydroxyapatite Single Crystals. J. of Crystal Growth, 1996, 163: 311-17.