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Abstract  

The paper investigates the validity of steady-state approximation for the case of constant rate thermal analysis experiments. It is shown that the approximation holds for the experiments run with a controlled rate of either the decomposition of the compound, or the production of gas.

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-DSC technique. Non-isothermal kinetics of the thermal decomposition of precursor was interpreted by Flynm–Wall–Ozawa (FWO) method [ 18 , 19 ]. The kinetic ( E a , ln A , mechanism) parameters of the thermal decomposition of precursor MgFe 2 (C 2 O 4 ) 3 ·6H 2

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Introduction to non-isothermal kinetics

Introduction in cinetica neizoterma E. Segal, D. Fatu, Academiei Republicii Socialiste Romania, Bucuresti, 1983

Journal of Thermal Analysis and Calorimetry
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2 O using TG–DTA technique. Non-isothermal kinetics of the decomposition process of α-LiZnPO 4 ·H 2 O was interpreted by a modified method [ 24 – 29 ], the apparent activation energy E a was obtained from iterative procedure [ 29 ], the most

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The thermal decomposition of the mixed-ligand complex of iron(III) with 2-[(o-hydroxy benzylidene)amino] phenol and pyridine-[Fe2O(OC6H4CH=NC6H4O)2(C5H5N)4]·2H2O and its non-isothermal kinetics were studied by TG and DTG techniques. The non-isothermal kinetic data were analyzed and the kinetic parameters for the first and second steps of the thermal decomposition were evaluated by two different methods, the Achar and Coats-Redfern methods. Steps 1 and 2 are both second-order chemical reactions. Their kinetic equations can be expressed as: dα/dt=Ae−E/RT(1-α)2

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The method suggested by several authors for determining the mechanism of solid-phase transformations by linearizing the function Ing(α) vs. 1/T is more correct for a hyperbolic temperature change than for a linear temperature change. In the latter case, the method yields reliable results only under the condition that the relationship Ing(α)/T 2 vs. 1/T is linear. The well-known Horowitz-Metzger method is essentially suited for processing thermokinetic curves obtained under hyperbolic heating or cooling.

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