MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
Orientation of Hydroxyapatite C-Axis under High Magnetic Field with Mold Rotation and Subsequent Sintering Process
Jun AkiyamaMasami HashimotoHiroaki TakadamaFukue NagataYoshiyuki YokogawaKensuke SassaKazuhiko IwaiShigeo Asai
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2005 Volume 46 Issue 11 Pages 2514-2517

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Abstract

Orientation of hydroxyapatite (HAp) crystals is one of the promising ways to utilize their anisotropic nature of chemical and biological properties. On the other hand, the development of super conducting magnet technology enables to introduce a high magnetic field which can control crystal orientation of non-magnetic materials with magnetic anisotropy. In this study, a horizontal 10 T static magnetic field was imposed on slurry containing HAp crystals under the horizontal mold rotation during slip casting process so as to introduce c-axis orientation for some amount of crystals in the sample, and then it was sintered in atmosphere without the magnetic field. From SEM observation and X-ray diffraction, it has been found that the c-axis of pillar shape HAp crystals in the sample treated with the magnetic field and the mold rotation were oriented to a particular direction and it was enhanced by the subsequent sintering process, while the c-axis crystal orientation of the sample treated without the magnetic field and with the mold rotation was not observed before and after the sintering.

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© 2005 The Japan Institute of Metals and Materials
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