Magnetite and Anti-Microbial Properties of Ag₂O-CaO-Fe₂O₃-SiO₂ Glass-Ceramic by Sol-Gel Method

Abstract:

Ag₂O-CaO-Fe₂O₃-SiO₂ glass-ceramic was prepared by the sol-gel method. Differential scanning calorimetry (DSC), X-ray diffraction (XRD), scanning electron microscopy (SEM) and vibrating sample magnetometer (VSM) were used to investigate crystallization process of Ag₂O-CaO-Fe₂O₃-SiO₂ glass. The kinetic results show that the values of the activation energy and frequency factor of the glass are 441.991 KJ/ mol and 1.58×10²⁰, respectively. And the dimensionality of crystal growth, n, decreases as the heating rate increases. The crystalline phases of the glass-ceramic are magnetite, wollastonite and minor hematite. The saturation magnetization and coercive force of the heat-treated glass are 0.08 Wb/m² and 14 KA/m at room temperature. The glass-ceramic has some capacity of anti-microbial.

• Periodical: Advanced Materials Research (Volumes 399-401)
• Pages: 869-872
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.399-401.869
• Online since: November 2011
• Authors: Bin Li, Hai Feng Chen, Li Hua Wen, Chen Ma
• Keywords: Ag₂O-CaO-Fe₂O₃-SiO₂, Anti-Microbial, Glas Ceramics, Magnetite, Sol-Gel (SG)

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