Fluoride glasses have been extensively studied due to their high transparency in the infrared wavelength. The crystallization
kinetics of these systems has been studied using DTA and DSC techniques. Most of the experimental data is frequently investigated
in terms of the Johnson-Mehl-Avrami (JMA) model in order to obtain kinetic parameters. In this work, DSC technique has been
used to study the crystallization of fluorozirconate glass under non-isothermal conditions. It was found that JMA model was
not fit to be applied directly to these systems, therefore, the method proposed by Mlek has been applied and the Šestk-Berggren
(SB) model seems to be adequate to describe the crystallization process.