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Synthesis and characterization of a calcium silicate bioactive glass

D. BACIU1, J. SIMITZIS1,*

Affiliation

  1. National Technical University of Athens, School of Chemical Engineering, Department III, "Materials Science and Engineering", Laboratory Unit "Advanced and Composite Materials", 9 Heroon Polytechniou

Abstract

Over the last three decades the bioactive ceramics including bioglasses, glass-ceramics, sintered hydroxyapatite, become one of the major fields in biomaterials, due to their intimate bond with living bone through the formation of a biologically active carbonate apatite interface layer. The purpose of the work was to examine the structure of a calcium silicate bioactive glass prepared by the sol-gel method. The samples were characterized by thermogravimetric and differential thermal analysis (TG/DTA), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). No traces of organic matter or nitrates in the stabilized material were found according to FTIR and TG/DTA measurements. The materials produced are amorphous even after stabilization at 700 oC up to about 850 oC. However, the materials sinterized at 10000C for 1 hour reveal crystalline phase and indeed that of CaSiO3 (wollastonite). Thus, the materials prepared by the sol-gel method are homogeneous with high purity and after their stabilization below their crystallization temperature, they are amorphous. These characteristics allow their application in the area of orthopedic and dental implants as a bone substitute biomaterial..

Keywords

Bioceramics, Bioglasses, Sol-gel processing, Calcium silicate glass, XRD, FTIR, DTA.

Submitted at: March 23, 2007
Accepted at: Nov. 16, 2007

Citation

D. BACIU, J. SIMITZIS, Synthesis and characterization of a calcium silicate bioactive glass, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 11, pp. 3320-3324 (2007)