The crystallization kinetics of the MgO-Al2O3-SiO2-TiO2 glass ceramics system produced from industrial waste

Abstract

The MgO-Al2O3-SiO2-TiO2 glass system was prepared by melting method. The crystallization behavior and crystallization kinetics of a sample with glass ceramic composition were examined. DTA and XRD analyses revealed the crystallization of Ca0.965Mg2Al16O27 cordierite (Mg2Al4Si5O18) and Fe2TiO5 phases. The activation energy for the crystallization of cordierite phase has been evaluated, and the crystallization mechanism has been studied by applying DTA measurements performed at various heating rates. The results indicate that the dominant crystallization mechanism for this system is bulk crystallization dominated by three-dimensional growth. The average calculated values of crystallization and viscous flow for the formation of crystal phases from the glass matrix were measured to be 410 and 390 kJ mol(-1), respectively.