水熱処理によるリン酸カルシウム結晶化ガラスの骨様アパタイト生成能の向上

概要

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60CaO・30P_2O_5・7Na_O・3TiO_2 glass-ceramic, which consists of crystalline β-Ca_3(PO_4)_2 and β-Ca_2P_2O_7 phases with a small amount of glassy calcium phosphate phase including sodium and titanium ions, has an apatiteforming ability in simulated body fluid (SBF) at 37℃; on the glass-ceramic, the bonelike apatite forms after 20 days of soaking in SBF. In the present work, the apatite-forming ability in SBF of the glass-ceramic was enhanced by a hydrothermal treatment in water at 140℃ for 1 h; the glass-ceramic was completely covered with bonelike apatite after 10 days of soaking. The phosphate glassy phase around the surface dissolved drastically during the treatment but almost no titanium ion dissolved. X-ray photoelectron spectroscopic analysis implied that the hydrated titania groups, which may induce nucleation of the apatite, form newly around the surface during the treatment.
社団法人日本セラミックス協会の論文
2003-09-01