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Improvements of Apatite-Forming Abilities on Pure and Sodium-Containing Diopside Substrates Using Porous Diopside Thin Films as Nucleating Agent

Published online by Cambridge University Press:  10 February 2011

N. Y. Iwata ,
S. Tsunakawa ,
M. Tanaka ,
T. Utsu  and
K. Matsumoto
N. Y. Iwata
Affiliation:
nori@cc.toin.ac.jp
S. Tsunakawa
Affiliation:
tunakawa@cc.toin.ac.jp
M. Tanaka
Affiliation:
Department of Materials Science, Toin University of Yokohama, 1614 Kurogane-cho, Aoba-ku, Yokohama 225–8502 Japan
T. Utsu
Affiliation:
Department of Materials Science, Toin University of Yokohama, 1614 Kurogane-cho, Aoba-ku, Yokohama 225–8502 Japan
K. Matsumoto
Affiliation:
Department of Materials Science, Toin University of Yokohama, 1614 Kurogane-cho, Aoba-ku, Yokohama 225–8502 Japan
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Abstract

Pure diopside, CaMgSi2O6 and the partly modified new type of crystalline diopside, NaxCa1-xMgSi2O6, were prepared mainly by coprecipitation process These ceramics were synthesized from the inorganic nitrates and the metal alkoxide in ethanol solutions. The sodium contents in the crystal had remarkable effect on the apparent densities and improved the mechanical properties, especially when the hot-isostatic pressing was applied in the final process. The precise measurements of the X-ray diffraction patterns strongly suggested that the Ca positions in the unit cell were partly substituted by the Na atoms. SBF soaking tests showed that the porous sol-gel method diopside induced the higher apatite crystal growth rates than the hot-pressed surface of the pure or the Na-modified diopside.

The surface of the coprecipitation process diopside specimens was coated with the porous ceramics for the purpose of the formation of the bioactive diopside films.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 599: Symposium DD – Mineralization in Natural & Synthetic Biomaterials , 1999 , 169
Copyright
Copyright © Materials Research Society 2000

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References

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