Synthesis And Characterization Of Sol-gel Derived SiO2-Na2O-CaO-P2O5-MgO Bioactive Glass As Biomaterial | 24690
Journal of Material Sciences & Engineering
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Bioactive glass samples containing SiO2-- Na2O- CaO - P2O5- MgO were prepared by sol-gel route. These glasses were
characterized to determine their use as biomaterials. The nucleation and crystallization regimes were determined by
differential thermal analysis (DTA) and the controlled crystallization of glass samples were carried out by heattreatment. The
crystalline phase formed after heat treatment was identified using X-ray powder diffraction technique. Bioactivity of these
glasses was measured before and after immersion of glass samples in simulated body fluid (SBF) for different time periods.
The formation of hydroxyl carbonate apatite (HCA) layer was identified by FTIR spectrometry, scanning electron microscope
(SEM) and XRD which showed the presence of HCA as the main phase in all tested bioglass samples. The pH measurement of
the SBF solution after immersion of the samples for different time periods also showed the formation of HCA through different
stages of chemical reactions on the surface of the bioglass samples. In-vitro studies of glass samples in SBF had shown that the
pH of the solution increased with increasing time period after immersion during initial stages of reaction and after attaining
maxima it further decreased with increasing time period. This indicated that the bioactivity of the samples had increased with
increasing duration of time and on later stages the decrease in pH of the solution with time had shown that the bioactivity of
the samples had decreased.
Himanshu Tripathi has completed his MTech in Ceramic Engineering at the age of 21 from Indian Institute of Technology (Banaras Hindu University), India and
pursuing his PhD from same institute. His area of research is bioactive glasses. He is working for his research work as a teaching assistant in the department of
Ceramic Engg of the institute. He has taught several theories and practical classes at BTech and MTech levels in Ceramic Engineering. He has published two
papers in reputed international journals. He has orally presented several research papers in various national and international seminars, symposia and conferences.
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