Influence of different Fe2O3 content on crystallization of MgO-Al2O3-SiO2-TiO2 system glass-ceramics

The crystallization behaviors of MgO-Al2O3-SiO2-TiO2 system glasses doping with different content Fe2O3 were investigated by means of differential thermal analysis and X-ray diffraction. The kinetic parameter of activation energy for crystallization (E) was obtained by the Owaza Johnson-Mehl-Avrami method. The results show that during the heat treatment, the intermediate phase of mu-cordierite initially precipitated from the glass matrix, and with the increasing temperature, it transformed to -cordierite. The more the Fe2O3 content, the lower the crystallization peak temperature (Tp).But the lowering of Tp value did not mean that the value of E decreases correspondingly. The experimental results suggest that only with appropriate content (about 4.2 wt%), Fe2O3 can promote the crystallization of this glass effectively.