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methods [ 6 – 8 ]. These investigations enable the activation energies for decomposition, decomposition rate constants at different temperatures, and thermal ranges of decomposition to be determined. The kinetic data enables the conditions of

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Introduction In material science research, solid state decomposition studies are of paramount importance [ 1 – 4 ]. Solid state kinetic data are of practical interest for the large and growing number of technologically

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Journal of Thermal Analysis and Calorimetry
Authors: Annamária Krajníková, Katarína Győryová, Daniela Hudecová, Jana Kovářová, and Zuzana Vargová

works we described the preparation, thermal, spectral and biological properties of aliphatic zinc(II) carboxylates [ 13 – 15 ], salicylates and halogenosalicylates [ 16 , 17 ] and benzoates [ 18 , 19 ]. It was found that the thermal decomposition of

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-isothermal conditions on standard TG–DSC apparatus [ 7 – 9 ]. Experimental NH 4 VO 3 from Fluka was used as a substrate. Decomposition was performed in dry air (Messer, Germany) containing 20.5 vol% O 2 , rest N 2 . Impurities occurred in

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. The finite element method in magnetics 2008 Kruis J. Domain decomposition methods for distributed computing , Kippen

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powder design. It is known that the melting rate increases with increasing carbon reactivity [ 7 ]. The reactivity of powder can be determined by knowing the decomposition kinetic of carbonaceous material; in this way, lower activation energy should be

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concentrated sulfuric acid was about 1.1–1.7, the decomposition temperature was from 600 to 800 °C. While the weight ratio in our study was about 1.8, decomposition reaction can be carried out in the temperature of 300 °C. Despite the extracting costs were

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Abstract  

The thermal decompositions of cobalt(II), nickel(II) and copper(II) complexes of4-(3'-sulfonylazido-6'-methoxyphenylazo)-1-phenyl-3-methyl-2-pyrazolin-5-one H(D1–SO2N3) and 4-(4'-sulfonylazido phenylazo)-3-phenyl-3-methyl-2-pyrazolin-5-one H(D2–SO2N3) were studied by thermogravimetry. The decomposition in all cases takes place along two stages. The first stage is due to the elimination of water and nitrogen molecules with the formation of tetracoordinate complexes containing nitrene reactive species[M(DSO2N:)2]. The second stage represents the decomposition of the material to the metal oxide. The kinetics of the decomposition were examined by using Coats–Redfern, the decomposition in all complexes was found to be first order for the first and second stages. The activation energies and other activation parameters ( H * and S * and G *) were computed and related to the bonding and stereochemistry of the complexes.

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]. In the present study, we have studied the thermal behavior of the [Ru( L 1 )( L 2 )(NCS) 2 ] complex. Based on the results of thermogravimetrical and mass analysis the decomposition mechanism for the [Ru( L 1 )( L 2 )(NCS) 2 ] complex has been

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valuable information can be obtained about the composition of the biomass samples using coupled techniques, where the volatile decomposition products are monitored by a mass spectrometer [ 16 – 18 ] or an infrared spectrometer [ 19 , 20 ]. The

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