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Thermal decomposition kinetics of potassium iodate

Part I. The effect of particle size on the rate and kinetics of decomposition

Journal of Thermal Analysis and Calorimetry
Author: K. Muraleedharan

thermally activated solid-state reactions to obtain thermal stability parameters of solids [ 4 – 8 ]. The kinetics of the thermal decomposition of inorganic materials could be markedly affected by pre-treatments, by the shortening of the induction period

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Introduction Thermal decomposition of solids is an important field of solid state chemistry with wide technical applications and has been used to obtain thermal stability parameters of solids [ 1 – 4 ]. The thermal

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Thermal decomposition of acrylamide from polyacrylamide

Time-resolved pyrolysis with ion-attachment mass spectrometry

Journal of Thermal Analysis and Calorimetry
Authors: Yuki Kitahara, Ko Okuyama, Keita Ozawa, Takuya Suga, Seiji Takahashi, and Toshihiro Fujii

Introduction The thermal decomposition of polyacrylamide (PAA) has received continued attention in the literature [ 1 – 5 ] for the following reasons: (i) PAA is used as an important thermoplastic material in many industries

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dissolves in water. To study the process of thermal decomposition and deduce the possible mechanism of thermal decomposition model and get the dynamic equation of thermal decomposition, the DTA-TG curves of glyphosate were investigated in temperature

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Journal of Thermal Analysis and Calorimetry
Authors: Hichem Eloussifi, Jordi Farjas, Pere Roura, Jaume Camps, Mohamed Dammak, Susagna Ricart, Teresa Puig, and Xavier Obradors

-performance superconducting films [ 9 , 10 ]. Knowledge of the processes that take place during decomposition of precursors as well as the formation of intermediate compounds is crucial to improve the performance of functional oxides. Moreover, in the synthesis of

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Journal of Thermal Analysis and Calorimetry
Authors: Igor Dalinger, Svyatoslav Shevelev, Vyacheslav Korolev, Dmitriy Khakimov, Tatyana Pivina, Alla Pivkina, Olga Ordzhonikidze, and Yuriy Frolov

intramolecular interactions should be responsible for the thermal stability and mechanisms of thermo decomposition of highly nitrated azoles. Kinetics of thermolysis provides a good approach for the mechanism of thermal decomposition of new compounds. We report

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Magoulès F., Roux F. X. Lagrangian formulation of domain decomposition methods: a unified theory, Applied Mathematical Modeling , Vol. 30, No. 7, 2006, pp. 593–615. Roux F. X. Lagrangian

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Theory of solid-state thermal decomposition reactions

Scientific stagnation or chemical catastrophe? An alternative approach appraised and advocated

Journal of Thermal Analysis and Calorimetry
Author: Andrew K. Galwey

Introduction It should, by now, be obvious to researchers interested in Thermal Decompositions of Solids that the theoretical foundations of this subject are (at best) of doubtful validity or (at worst) nonexistent. The

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Abstract  

We have studied the dehydration and the calcination under atmospheric pressure of cyclotriphosphate tetrahydrate of nickel and sodium, NiNa4(P3O9)2·6H2O, between 25 and 700°C by thermal analyses (TG, DTA) infrared spectrometry and X-ray diffraction. This study allows us the identification and the crystallographic characterization of a new phase, NiNa4(PO3)6, obtained between 350 and 450°C. NiNa4(PO3)6 crystallizes in the triclinic system, P–1, with the following unit cell parameters a=6.157(3) Å, b=6.820(6) Å, c=10.918(6) Å, =80.21(5)°, =97.80(9)°, =113.49(3)°, V=409.8 Å3, Z=1, M(19)=25 and F(19)=48 (0.0095; 42). The calcination of NiNa4(PO3)6, between 500 and 600°C, leads to a mixture of long-chain polyphosphates NiNa(PO3)3 and NaPO3. The kinetic characteristics of the dehydration of NiNa4(P3O9)2·6H2O were determined and discussed. The vibrational spectrum of the title compound, NiNa4(P3O9)2·6H2O, was interpreted in the domain of the stretching vibrations of the P3O9 rings, on the basis of its crystalline structure and in the light of the calculation of the normal IR frequencies of the P3O9 ring with D3h symmetry.

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