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. The polymer plays the role of binder in ceramic green body that is why it must be removed from the element to achieve fully densified, polycrystalline ceramic body [ 18 ]. The polymer is removed by its thermal decomposition during debinding process

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]. Similar to the clay minerals [ 29 , 30 ], thermal decomposition of asbestos minerals generally takes place according to three stages [ 7 , 31 ]. The first is associated with the loss of adsorbed water. The next step is connected to the removal of

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decompose, while at higher temperatures, the peroxyester fragments break down [ 5 ]. N 2 is released in the first stage and CO 2 in the second (Scheme 2 ). Scheme 2 Thermal decomposition pathways of azo

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Journal of Thermal Analysis and Calorimetry
Authors: Juliusz Leszczynski, Krzysztof T. Wojciechowski, and Andrzej Leslaw Malecki

polished. Thermal decomposition and oxidation studies and the decomposition and oxidation products analysis The dense (99.8%), polycrystalline samples of CoSb 3 were thermally treated under vacuum of 10 −3 Pa in sealed

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Introduction This work is a continuation of our previous studies on synthesis, properties, and thermal decomposition of metal complexes with bipyridine isomers and carboxylates [ 1 – 7 ]. Lanthanide compounds are curious for

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transition metal ions with organic ligands, it is customary to investigate the thermal decomposition of these complexes so as to obtain useful data on the metal–ligand bonds [ 2 – 4 ] and stability trends. The thermal investigations on some derivatives of

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of such compounds should be possible simple and low-priced. The obtained compounds should be also thermal stable what is associated with conditions of medicine production processes. In addition, the thermal decomposition of magnesium coordination

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Abstract  

Two types of ammonium uranyl nitrate (NH4)2UO2(NO3)4·2H2O and NH4UO2(NO3)3, were thermally decomposed and reduced in a TG-DTA unit in nitrogen, air, and hydrogen atmospheres. Various intermediate phases produced by the thermal decomposition and reduction process were investigated by an X-ray diffraction analysis and a TG/DTA analysis. Both (NH4)2UO2(NO3)4·2H2O and NH4UO2(NO3)3 decomposed to amorphous UO3 regardless of the atmosphere used. The amorphous UO3 from (NH4)2UO2(NO3)4·2H2O was crystallized to γ-UO3 regardless of the atmosphere used without a change in weight. The amorphous UO3 obtained from decomposition of NH4UO2(NO3)3 was crystallized to α-UO3 under a nitrogen and air atmosphere, and to β-UO3 under a hydrogen atmosphere without a change in weight. Under each atmosphere, the reaction paths of (NH4)2UO2(NO3)4·2H2O and NH4UO2(NO3)3 were as follows: under a nitrogen atmosphere: (NH4)2UO2(NO3)4·2H2O → (NH4)2UO2(NO3)4·H2O → (NH4)2UO2(NO3)4 → NH4UO2(NO3)3 → A-UO3 → γ-UO3 → U3O8, NH4UO2(NO3)3 → A-UO3 → α-UO3 → U3O8; under an air atmosphere: (NH4)2UO2(NO3)4·2H2O → (NH4)2UO2(NO3)4·H2O → (NH4)2UO2(NO3)4 → NH4UO2(NO3)3 → A-UO3 → γ-UO3 → U3O8, NH4UO2(NO3)3 → A-UO3 → α-UO3 → U3O8; and under a hydrogen atmosphere: (NH4)2UO2(NO3)4·2H2O → (NH4)2UO2(NO3)4·H2O → (NH4)2UO2(NO3)4 → NH4UO2(NO3)3 → A-UO3 → γ-UO3 → α-U3O8 → UO2, NH4 UO2(NO3)3 → A-UO3 → β-UO3 → α-U3O8 → UO2.

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Journal of Thermal Analysis and Calorimetry
Authors: D. Wyrzykowski, E. Hebanowska, G. Nowak-Wiczk, M. Makowski, and L. Chmurzyński

, citric acid is removable by either heat treatment or thermal decomposition, without affecting the properties of a material [ 6 – 8 ]. Barbooti and Al-Sammerrai [ 9 ] reported on the thermal decomposition of citric acid. As stated, the

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.50 53.00 59.85 As seen from the results presented in Table 1 , at about 935 °C, the thermal decomposition of indium(III) molybdate(VI) begins to yield the initial

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