The effect of alkali earth metal oxides MO (M=Mg, Ca, Ba) on the crystallizing behavior and the microstructure of B2O 3-Al2O3-SiO2 system (BAS) were studied. DSC, XRD and SEM were used to analyze the crystallization kinetics and to characterize the crystal phases and microstructures of the glass-ceramics. MO can effectively facilitate the formation of BAS glass, and the crystallinity of the glass increases in the order of MgO <BaO <CaO. For one given MO, the crystallinity of the glass is dependent on B2O 3/SiO2 ratio: the lower the ratio is, the weaker the crystallinity of the glass will...
