Crystallization kinetics of Bi0.25Y2.75Fe5O12 prepared from coprecipitation process under non-isothermal conditions

The non-isothermal crystallization kinetics of Bi0.25Y2.75Fe5O12 powder prepared by the coprecipitation process has been investigated. The activation energy of crystallization was calculated by differential scanning calorimetry (DSC) at different heating rates. From non-isothermal DSC data presented values in the range of 712-772 kJ/mol and 2.90-3.46 for the activation energy of crystallization and the Avrami exponent, respectively at specific temperature ranging form 750.0 to 757.5 °C. This value for the Avrami exponent indicates that the controlling mechanism of crystallization is three-dimensional interfacial growth.