MAS NMR studies of apatite formation on 50CaO.50SiO2 glass in a simulated body fluid

S. Hayakawa, S. Tsuru, H. Iida, C. Ohtsuki, A. Osaka

研究成果査読

14 被引用数 (Scopus)

抄録

29Si and 31P MAS NMR spectra of 50CaO.50SiO2 glasses before and after soaking in a simulated body fluid(SBF) for various periods were measured and the chemical processes leading to apatite formation were derived. The network of 50CaO.50SiO2 glass consisted mainly of Q2 group. The fraction of Qn (n=2-4) group changes with immersion time in SBF. In the initial stage of apatite formation the Q2 group comprising the 50CaO.50SiO2 glass network dissolves or changes rapidly into the Q3 group by not only self condensation but also the polymerisation of the Q2 group with phosphate ions with a few P-OH bonds in the SBF. The phosphate silicate matrix layer and hydrated silica gel layer formed on the glass surface mainly consist of the Q3 group. These layers provide the active sites where phosphate ions can be adsorbed easily and apatite nuclei can form. The local structure around a P atom may be very similar to that of hydroxyapatite or CaHPO4.2H2O crystals.

本文言語English
ページ(範囲)188-192
ページ数5
ジャーナルPhysics and Chemistry of Glasses
37
5
出版ステータスPublished - 1996

ASJC Scopus subject areas

  • セラミックおよび複合材料
  • 物理化学および理論化学

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