Preparation and Characterization of Zinc-substituted Bioactive Glasses with Sol–gel Method | ||||
| Egyptian Journal of Biomedical Engineering and Biophysics | ||||
| Article 1, Volume 16, Issue 1, December 2015, Page 1-20 PDF (1.19 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejbbe.2015.317 | ||||
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| Abstract | ||||
| IN PRESENT study, Different bioactive glass samples are prepared based on the following general formula: [65%SiO2–(25-X) %CaO–10% P2O5–X%ZnO)]; Ca2+ is gradually substituted with Zn2+ (percentages of X= 0, 2, 4, 6, 8 and 10 mol %) by a quick alkali-mediated sol–gel method. Development of a calcium phosphate (CP) layer on their surfaces is studied by soaking them in a simulated body fluid (SBF) for different periods. The consequent formation of the CP layer is studied by means of appropriate techniques such as X-ray diffractometry (XRD), Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM) with an energy dispersive system (EDXS). The concentration of Ca2+, P5+ ions released from the samples into the SBF is measured by using UV-Vis Spectrophotometer and biochemical Kits. The results show that the formation of calcium phosphate layer on glass surfaces is inhibited by ZnO substitution, and strongly dependent on Zn2+ concentration. | ||||
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