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Journal of Materials Science: Materials in Medicine

, Volume 15, Issue 11, pp 1247–1253 | Cite as

Effect of solid/solution ratio on apatite formation from CaSiO3 ceramics in simulated body fluid

  • Yusuke Iimori
  • Yoshikazu Kameshima
  • Atsuo Yasumori
  • Kiyoshi Okada
Article

Abstract

The effect of the solid/solution (S/S) ratio on apatite formation from CaSiO3 ceramics in simulated body fluid (SBF) was investigated. CaSiO3 ceramics with a Ca/Si ratio of 0.91 were prepared by sintering CaSiO3 powder coprecipitated from ethanol solutions of Ca(NO3)2⋅4H2O and Si(OC2H5)4 using NH4OH as the precipitant. These ceramics were reacted with SBF at S/S ratios of 1.0, 2.5 and 8.3 mg/ml at 36.5 C for various times. Formation of apatite was observed at all the S/S ratios after soaking for 1 day. The amount and microstructure of the apatite obtained at a S/S ratio of 8.3 mg/ml, however, differed largely from the product formed at the other two S/S ratios. The apatite formed at S/S = 8.3 mg/ml was of smaller particle size, formed in smaller amount and with less preferred orientation of the (00l) of apatite crystals compared with those formed at S/S = 1.0 and 2.5 mg/ml. An increase of Ca and decrease of the P components occurred in the soaked SBF at S/S = 8.3 mg/ml, the changes being much more marked than with the other two S/S ratios. These differences in the concentration changes in SBF at different S/S ratios are attributed to the difference in the apatite formation from the CaSiO3 ceramics.

Keywords

Polymer Particle Size Microstructure 4H2O Small Particle 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Kluwer Academic Publishers 2004

Authors and Affiliations

  • Yusuke Iimori
    • 1
    • 2
  • Yoshikazu Kameshima
    • 1
  • Atsuo Yasumori
    • 1
    • 3
  • Kiyoshi Okada
    • 1
  1. 1.Department of Metallurgy and Ceramics ScienceTokyo Institute of TechnologyTokyoJapan
  2. 2.PENTAX Corp.TokyoJapan
  3. 3.Tokyo Science UniversityChibaJapan

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