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2017 | 131 | 1 | 139-142
Article title

The Kinetics of Spinel Formation of Algerian Halloysite by Differential Thermal Analysis

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Abstracts
EN
The kinetics of spinel (Al-Si) crystallization from Algerian halloysite (DD1) was investigated using differential thermal analysis. Experiments were carried out on samples between room temperature and 1400°C with constant heating rate from 2 to 20°C min¯¹. The activation energies measured from isothermal and non-isothermal treatments were 1054.85 and 1140 kJ mol¯¹, respectively, for the spinel (Al-Si) formation. The Avrami constant n obtained by the Ligero method and the m parameter obtained by the Matusita method were about 2 for spinel crystallization. This value indicates that the crystallization mechanism of Al-Si spinel phase proceeds by bulk nucleation of the phase formation with a constant number of nuclei and that the three-dimensional growth of crystals is controlled by diffusion.
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Contributors
author
  • Physics and Chemistry of Materials Lab, Department of Physics, University Mohamed Boudiaf of M'sila, 28000, M'sila, Algeria
author
  • Physics and Chemistry of Materials Lab, Department of Physics, University Mohamed Boudiaf of M'sila, 28000, M'sila, Algeria
author
  • Laboratoire des Matériaux non Métalliques, I. O. M. P, Université Ferhat Abbas Sétif 1, 19000, Sétif, Algeria
author
  • Physics and Chemistry of Materials Lab, Department of Physics, University Mohamed Boudiaf of M'sila, 28000, M'sila, Algeria
author
  • Physics and Chemistry of Materials Lab, Department of Physics, University Mohamed Boudiaf of M'sila, 28000, M'sila, Algeria
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Document Type
Publication order reference
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bwmeta1.element.bwnjournal-article-appv131n138kz
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