Kinetic thermal analysis of glass ceramics from industrial wastes

To recycle inorganic industrial solid wastes, the use of glass ceramics has been proposed as a useful choice. In this work, a pyroxene glass ceramic of the CaO–MgO–Al 2O 3–SiO 2 family was synthesized by mixing three industrial wastes of high production rate generated in northeast Mexico. A kinetic study was carried out by a non-isothermal differential thermal analysis technique (DTA) from which the kinetic parameters, activation energy for crystallization, E a, of 534 ± 4 kJ mol −1, frequency factor, ν, of 5.60 × 10 20 min −1 and Avrami factor, n, values between 1.2 ± 0.2 and 1.3 ± 0.1 were estimated, corresponding to a surface crystallization mechanism.