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Synthesis of CoNi2O3 and kinetics of thermal decomposition of the oxalate precursor by constant transformation rate thermal analysis (CRTA) under vacuum

Kais Nahdi, Malika Trabelsi Ayedi

The thermal decomposition processes taking place in the solid state oxalate mixture of CoC2O4.2H2O-NiC2O4.2H2O (1:2 mole ratios) in air have been studied using TG-DTGandDSCtechniques. The parentmixture andmixtures calcined at different temperatures in air were characterized using XRD and FT-IR techniques. The Kinetic analysis of the thermal decomposition of the binary oxalatesmixturewas performed byControlled Rate ThermalAnalysis technique under residual partial pressure of 10-3hPa. The activation energy for each decomposition step was measured experimentally and the possible conversion function f() was investigated.