No abstract

No abstract

No abstract

No abstract

The crystallization behaviors of MgO-Al 2 O 3 -SiO 2 -TiO 2 system glasses doping with different content Fe 2 O 3 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 m-cordierite initially precipitated from the glass matrix, and with the increasing temperature, it transformed to -cordierite. The more the Fe 2 O 3 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%), Fe 2 O 3 can promote the crystallization of this glass effectively.