Apatite Converted from 3-D Ordered Macroporous Sol–Gel Bioactive Glass (3DOM-BG) Particles

doi:10.1111/j.1551-2916.2005.00143.x

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Wiley InterScience

Journal of the American Ceramic Society

Volume 88 Issue 3, Pages 587 - 592

Published Online: 24 Feb 2005

Published on behalf of the American Ceramic Society (ACerS)

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Apatite Converted from 3-D Ordered Macroporous Sol–Gel Bioactive Glass (3DOM-BG) Particles

Kai Zhang ¹ ^† , Lorraine F. Francis ¹ ^* ^‡ , Hongwei Yan ² and Andreas Stein ²

¹ Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455
² Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455

^‡Author to whom correspondence should be addressed. e-mail: lfrancis@umn.edu

W-Y. Ching—contributing editor

Presented at the 105th Annual Meeting of The American Ceramic Society, Nashville, TN, April 29, 2003 (Symposium S2, Paper No. AM-S2-1-2003).

Supported primarily by the MRSEC program of the National Science Foundation, under award numbers DMR-9809364 and DMR-0212302.

^*Member, American Ceramic Society.

^†Current address: Materials Research, Zimmer Inc., Warsaw, IN 46580.

ABSTRACT

3-D ordered macroporous sol–gel bioactive glass particles (3DOM-BG, pore size: 345 nm; molar composition: 75 SiO₂–21 CaO–4 P₂O₅) were converted into nano-crystalline calcium-deficient carbonate apatite after soaking at 37°C in simulated body fluid. The as-formed, flake-like apatite transformed into a coral-like, highly crystalline hydroxyapatite with a minor tri-calcium phosphate phase after heating for 1 h at a temperature of 700°C. Fourier transform infrared results show the loss of carbonate and isolation of hydroxyl during heating. The heat treatment improved the apatite's resistance to dissolution in a buffer solution (pH=5).

Manuscript No. 10303. Received November 6, 2003; approved April 15, 2004.

DIGITAL OBJECT IDENTIFIER (DOI)

10.1111/j.1551-2916.2005.00143.x About DOI