Effect of MgO/Al2O3 Ratio on Properties and Crystallization of Glass-Ceramics

Reduction electric furnace slag, quartz sand and soapstone were used as the raw materials for preparation of glass-ceramics according to their compositions and characteristics. Differential thermal analysis, X-ray diffraction, scanning electron microscopy were used to investigate the crystallization mechanism, microstructure and main mechanical properties of slag glass-ceramics with different mass ratios of MgO/Al2O3. The exothermic peaks of the DTA curves shift to higher temperature with the decrease of MgO/Al2O3 ratio. And along with the decreasing of the MgO/Al2O3, the crystallization of the glass-ceramics also decreased. The bending strength can reach 153.09MPa when the MgO/Al2O3 ratio is 3.03.