Abstract
Differential thermal analysis-thermogravimetry (DTA-TG), X ray diffraction (XRD), and scanning electron microscopy (SEM) techniques were used to study the formation of CuCr2S4 spinel and the thermal decomposition reactions in crystalline mixtures of copper and chromium sulfides. The copper-chromium sulfide spinel was characterized by XRD and SEM and the kinetics of formation was followed in the temperature range 200-300°C by a titrimetric method. Kinetic analysis in view of various solid-state reaction models showed that the reaction is best described by the diffusion models with an average activation energy 24.6 ± 1.6 kJ/mol.
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