Influence of different Fe₂O₃content on crystallization of MgO–Al₂O₃–SiO₂–TiO₂system glass-ceramics

Abstract

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 µ-cordierite initially precipitated from the glass matrix, and with the increasing temperature, it transformed to α-cordierite. The more the Fe2O3 content, the lower the crystallization peak temperature (T p).But the lowering of T p 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.