Determining crystallization kinetic parameters of Li2O–Al2O3–SiO2 glass from derivative differential thermal analysis curves

The kinetic parameters such as crystallization activation energy, E, and the frequency factor, ν, of Li2O–Al2O3–SiO2 glass were determined by a new non-isothermal method. The method is described by the equation ln Tf2/β=E/RTf+ln(E/R)−ln ν, where β is the heating rate and Tf is the inflection-point temperature of differential thermal analysis (DTA). The value of Tf is determined as the maximum peak temperature on derivative differential thermal analysis (DDTA) curves. Values of E and ν of Li2O–Al2O3–SiO2 glass were also determined by two existing non-isothermal methods, namely the Kissinger plot and the Ozawa plot, and compared with those determined by isothermal method. Values of E and ν determined by the proposed equation were 332 kJ/mol and 1.4×1013 s−1, respectively. They are excellent agreement with the isothermal analysis results, 336 kJ/mol and 1.8×1013 s−1, respectively. In contrast, both the Kissinger equation and the Ozawa equation give much higher values of E and ν.