Kinetics
of decomposition of different acid calcium phosphates |
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| Authors: | Alexandra Ioi?escu Gabriela Vlase T Vlase N Doca |
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| Institution: | (1) Research Center for Thermal Analysis in Environmental Problems, West University of Timişoara, Timişoara, Romania, 300115, Str. Pestalozzi No.16 |
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| Abstract: | The kinetics of thermal decomposition
of Ca(H2PO4)2·H2O
under non-isothermal conditions was studied. The TG/DTG curves were obtained
at five heating rates: 5, 7, 10, 12 and 20 K min–1.
The kinetic analysis was performed by means of three methods: Friedman,
Budrugeac–Segal and NPK by Sempere and Nomen. An important dependence
of the activation energy vs. the conversion
degree was observed and also a compensation effect. The decomposition consists
of water loss and is due to the elimination of crystallization water and an
intermolecular condensation, respectively. |
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| Keywords: | calcium phosphates non-isothermal kinetics thermal analysis |
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