Effect of CaO/SiO₂ Ratio and TiO₂ on Glass-Ceramics Made from Steel Slag and Fly Ash

Abstract:

Glass ceramics of the CaO-MgO-Al₂O₃-SiO₂ system were fabricated by adopting the melting-casting procedure. Steel slag and fly ash were used as the major starting materials. The influence of CaO/SiO₂ Ratio variations on the microstructure and mechanical properties were investigated using X-ray diffraction, scanning electron microscopy and property measurements. Augite is identified as the main crystalline phase of the as studied glass ceramics. The average size of augite grains in form of spherical particles is found within the range of 100-250nm. The bending strength of the glass-ceramics could reach as high as 170.74MPa. Increasing CaO/SiO₂ show a beneficial influence on the crystallization of glass ceramics, and its effectiveness is inferior compared with that of increasing addition of nucleating agent, TiO₂.

• Periodical: Applied Mechanics and Materials (Volumes 217-219)
• Pages: 119-123
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.217-219.119
• Online since: November 2012
• Authors: Bao Wei Li, Hua Chen, Ming Zhao, Xue Feng Zhang, Yong Sheng Du, Lei Bo Deng
• Keywords: CaO/SiO₂, Fly Ash (FA), Glass Ceramics, Steel Slag, TiO₂

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