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Kinetics of decomposition of different acid calcium phosphates

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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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Authors and Affiliations

  1. Research Center for Thermal Analysis in Environmental Problems, West University of Timişoara, Timişoara, Romania, 300115, Str. Pestalozzi No.16

    Alexandra Ioiţescu, Gabriela Vlase, T. Vlase & N. Doca

Authors
  1. Alexandra Ioiţescu
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  2. Gabriela Vlase
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  3. T. Vlase
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  4. N. Doca
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Correspondence to T. Vlase.

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Ioiţescu, A., Vlase, G., Vlase, T. et al. Kinetics of decomposition of different acid calcium phosphates. J Therm Anal Calorim 88, 121–125 (2007). https://doi.org/10.1007/s10973-006-8022-3

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  • DOI: https://doi.org/10.1007/s10973-006-8022-3

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