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Hydrotheral Synthesis of Hydroxyapatite Powders with Zirconia Dispersion

Published online by Cambridge University Press:  26 February 2011

Koji Ioku ,
Masahiro Yoshimura  and
Shigeyuki Sōmiya
Koji Ioku
Affiliation:
Research Laboratory of Engineering Materials, Tokyo Institute of Technology, 4259, Nagatsuta, Midori, Yokohama 227 Japan
Masahiro Yoshimura
Affiliation:
Research Laboratory of Engineering Materials, Tokyo Institute of Technology, 4259, Nagatsuta, Midori, Yokohama 227 Japan
Shigeyuki Sōmiya
Affiliation:
Research Laboratory of Engineering Materials, Tokyo Institute of Technology, 4259, Nagatsuta, Midori, Yokohama 227 Japan
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Abstract

Hydroxyapatite (HAp) fine powders dispersed with zirconia were prepared by hydrothermal techniques at 200°C, under 2 MPa for 10 h. The transmission electron microscopy (TEM) showed the homogeneous mixtures of HAp and zirconia.The HAp powders were stoichiometric fine single crystals of about 90 nm × 25 nm in size and the zirconia powders were also fine single crystals of about 10 nm in size. The reactivity between HAp and zirconia was examined. According to the X-ray diffractometry (XRD), decomposition of HAp to B-tricalcium phosphate (β-TCP) was observed above 800°C then β-TCP was transformed into α-TCP at about 1200°C.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 110: Symposium M – Biomedical Materials and Devices , 1987 , 445
Copyright
Copyright © Materials Research Society 1988

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