Effect of cullet addition on the crystallization of glasses based on blast furnace slag

Reference Presenter Authors
11-029 Catia Fredericci Fredericci, C.(Instituto de Pesquisas Tecnológicas do Estado de São Paulo); The aim of this work was to study the crystallization of glasses prepared from a mixture of 80 w% blast furnace slag and 20 wt% bottle glass cullet (soda-lime-silica glass) melted in alumina-zirconia-silica (AZS) and alumina-magnesia (spinel) crucibles. The glasses obtained presented a little difference in chemical composition when compared with the nominal composition due to a small corrosion of the crucibles. Differential thermal analysis (DTA), optical microscopy (OM), scanning electron microscopy (SEM), dispersive energy spectroscopy (EDS) and X ray diffraction (XRD) were used for studying the glass crystallization mechanism and the crystalline phases developed in the glass-ceramic. Surface crystallization of melilite and diopside was observed.
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