The effect of alkali earth metal oxides MO (M=Mg,Ca,Ba) on the crystallizing behavior and the microstructure of B2O3-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 B2O3/SiO2 ratio:the lower the ratio is,the weak...
