Authors:D. Melo, R. M. M. Marinho, F. T. G. Vieira, S. J. G. Lima, E. Longo, A. G. Souza, A. S. Maia, and I. M. G. Santos
TG curves ( Fig. 1 a) showed three thermal decomposition steps, except for sample with 10% of copper that presented four steps. The first step was assigned to the elimination of water and gases
Authors:F. T. G. Vieira, A. L. M. Oliveira, D. S. Melo, S. J. G. Lima, E. Longo, A. S. Maia, A. G. Souza, and I. M. G. Santos
carbonatedecomposition. In the present work the fourth step was assigned to the elimination of hydroxyls. Another mass loss was observed (fifth step) only for doped samples above 1000 °C, with the last endothermic peak at about 1080 °C for Sr 0.90 Fe 0
Authors:Alex Neves Junior, Romildo Dias Toledo Filho, Eduardo de Moraes Rego Fairbairn, and Jo Dweck
Typical TG and DTG curve examples of the pastes prepared with W/C = 0.55, on respective sample initial mass basis, are presented, respectively, in Figs. 3 and 4 .
TG curves of
Authors:Cristina Bucur, Mihaela Badea, Calu Larisa, Dana Marinescu, Maria Nicoleta Grecu, Nicolae Stanica, Mariana Carmen Chifiriuc, and Rodica Olar
. This step corresponds to carbonatedecomposition and oxidative degradation of bismacrocyclic ligand leading finally to the non-stoichiometric nickel (II) oxide (found/calcd. overall mass loss: 82.1/82.9%). The nature of final product was confirmed by IR
Authors:J. L. Perez-Rodriguez, A. Duran, and L. A. Perez-Maqueda
°C that corresponded with an endothermic effect in the DTA curve attributed to carbonatesdecomposition. The observed decomposition temperature around 750 °C indicated that the carbonates phases were well crystallised, which was in agreement with XRD
Authors:Kia Angus, Paul Thomas, and Jean-Pierre Guerbois
that the precipitate is finely divided and, at best, microcrystalline.
The basic carbonatedecomposition step is accompanied by the oxidation of Fe II to Fe III and Co II to Co III to produce the spinel structure which is confirmed by the
Authors:Marisa S. Crespi, Quézia V. Martins, Sonia de Almeida, Hernane S. Barud, Marcelo Kobelnik, and Clóvis A. Ribeiro
vinasse, the carbonatedecomposition rate was 23%, between 760 and 1000 °C, with an evident endothermic peak in the DSC curves. For the ash, only one mass loss was observed (2.4%), with silica as the remaining residue.
carbonatedecomposition, seems to be going on during stages 3 and 4 of the thermal run on the physical mixture. On the other hand, Fig. 4 shows that the main XRPD peaks observed on the residual of the physical mixture recovered at the end of the
Authors:A. P. Surzhikov, A. M. Pritulov, E. N. Lysenko, A. N. Sokolovskii, V. A. Vlasov, and E. A. Vasendina
effects of lithium carbonatedecomposition, no direct evidence of lithium pentaferrite phase occurrence was revealed.
Radiation-thermal ferritization whose duration is 10 min or longer leads to qualitative changes of the TG/DSC dependences
Authors:Houda Zendah, Ismail Khattech, and Mohamed Jemal
determined by thermogravimetry, using a thermobalance (type B60, SETARAM, French). Carbonatesdecompose into carbon dioxide by heating the solids up to 1000 at 150 °C/h rate under inert gas flow (Argon). Preliminary experiments showed that CO 2 release