Structural Characterization of Gel-Derived Calcium Silicate Systems

• Published in: The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory Molecules, spectroscopy, kinetics, environment, & general theory, 2010-09, Vol.114 (38), p.10403-10411
• Main Authors: Meiszterics, Anikó, Rosta, László, Peterlik, Herwig, Rohonczy, János, Kubuki, Shiro, Henits, Péter, Sinkó, Katalin
• Format: Article
• Language: English
• Subjects: A: Kinetics, Spectroscopy; Calcium Compounds - chemical synthesis; Calcium Compounds - chemistry; Ceramics - chemical synthesis; Ceramics - chemistry; Gels - chemical synthesis; Gels - chemistry; Molecular Structure; Silicates - chemical synthesis; Silicates - chemistry
• ISSN: 1089-5639; 1520-5215
• DOI: 10.1021/jp1053502

The main aim of this study is to synthesize calcium silicate ceramics that exhibit suitable properties to be used for biomedical applications. In the present work, attention was paid to the understanding of processing−structure relationships. A particular effort was made to clarify the identification of Ca−O−Si bonds by means of spectroscopy. The calcium silicate systems were prepared via a sol−gel route, varying the chemical compositions, the catalyst concentration, and the temperature and time of aging and heat treatment. The processes and the phases evolved during the sol−gel procedure were determined. The bond systems were investigated by Fourier transform infrared (FTIR) and 29Si magic angle spinning nuclear magnetic resonance (MAS NMR) spectroscopy and the aggregate structures by scanning electron microscopy (SEM), small-angle neutron scattering (SANS), small-angle X-ray scattering (SAXS), wide-angle X-ray scattering (WAXS), and X-ray diffraction (XRD) measurements.