Porous Hydroxyapatite with Tailored Crystal Surface Prepared by Hydrothermal Method

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Porous plates of hydroxyapatite (Ca10(PO4)6(OH)2; HA) with about 0.5 to 5 mm in thickness and porous HA granules of about 40 µm to 1 mm in size with tailored crystal surface were prepared by the hydrothermal vapor exposure method at the temperatures above 105 °C under saturated vapor pressure of pure water. Porous HA plates with about 75 % porosity prepared at 120 °C were composed of rod-shaped crystals of about 20 µm in length. Porous HA granules prepared at 160 °C were also composed of rod-shaped crystals of about 20 µm in length with the mean aspect ratio of 30. These crystals were elongated along the c-axis. Rod-shaped HA crystals were locked together to make micro-pores of about 0.1 to 0.5 µm in size. Both of materials were nonstoichiometric HA with calcium deficient composition. These materials must have the advantage of adsorptive activity, because they had large specific crystal surface and much micro-pores.

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Periodical:

Key Engineering Materials (Volumes 284-286)

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Edited by:

Panjian Li, Kai Zhang and Clifford W. Colwell, Jr.

Pages:

353-356

Citation:

K. Ioku et al., "Porous Hydroxyapatite with Tailored Crystal Surface Prepared by Hydrothermal Method", Key Engineering Materials, Vols. 284-286, pp. 353-356, 2005

Online since:

April 2005

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$38.00

[1] K. Ioku, M. Yoshimura and S. Somiya: Bioceramics Vol. 1 (Ishiyaku EuroAmerica, Tokyo and St. Louis 1989), p.62.

[2] K. Ioku, M. Yoshimura and S. Somiya: Biomaterials Vol. 11 (1990), p.57.

[3] K. Ioku, M. Yoshimura and S. Somiya: Phosphorus Res. Bull. Vol. 1 (1991), p.15.

[4] M. Yoshimura, H. Suda, K. Okamoto and K. Ioku: J. Mater. Sci. Vol. 29 (1994), p.3399.

[5] K. Ioku, K. Yamamoto, K. Yanagisawa and N. Yamasaki: Phosphorus Res. Bull. Vol. 4 (1994), p.65.

[6] K. Ioku, A. Oshita, H. Fujimori, S. Goto and M. Yoshimura: Trans. Mater. Res. Soc. Japan Vol. 26 (2001), p.1243.

[7] K. Ioku, S. Yamauchi, H. Fujimori, S. Goto and M. Yoshimura: Solid State Ionics, Vol. 151 (2002), p.147.

[8] K. Ioku, S. Nishimura, Y. Eguchi and S. Goto: Rev. High Pressure Sci. Technol., Vol. 7 (1998), p.1398.

[9] K. Ioku, M. Fukuhara, H. Fujimori and S. Goto: Korean J. Ceram. Vol. 5 (1999), p.115.

[10] K. Ioku, H. Misumi, H. Fujimori, S. Goto and M. Yoshimura: Proc. 5th Int. Conf. SolvoThermal Reactions (Rutgers, The State Univ. of NJ, USA 2002), p.233.

[11] K. Ioku, M. Toda, H. Fujimori, S. Goto and M. Yoshimura: Key Engineering Materials Vols. 254-256 (Bioceramics Vol. 16) (2004), p.19.

[12] H. Monma and T. Kanazawa, J. Ceram. Soc. Japan, Vol. 84 (1976), p.209.

[13] K. Ioku, T. Murakami, Y. Ikuma, and M. Yoshimura: J. Ceram. Soc. Japan Int. Edition Vol. 100 (1992), p.1015.

[14] W. Paul and C. P. Sharma: J. Mater. Sci.: Mater. Med. Vol. 10 (1999), p.383.

[15] V. S. Komlev and S. M. Barinov: J. Mater. Sci.: Mater. Med. Vol. 13 (2002), p.295.