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

• Authors: M. Heraiz , F. Sahnoune , H. Belhouchet , A. Raghdi , A. Ouali
• Languages of publication: EN

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.

Keywords

EN

81.70.Pg; 81.20.Ev; 82.20.-w

Discipline

• 82.20.-w: Chemical kinetics and dynamics
• 81.20.Ev: Powder processing: powder metallurgy, compaction, sintering, mechanical alloying, and granulation
• 81.70.Pg: Thermal analysis, differential thermal analysis (DTA), differential thermogravimetric analysis

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2017
• Volume: 131
• Issue: 1
• Pages: 139-142

Dates

published

2017-01

Contributors

author

M. Heraiz

• Physics and Chemistry of Materials Lab, Department of Physics, University Mohamed Boudiaf of M'sila, 28000, M'sila, Algeria

author

F. Sahnoune

• Physics and Chemistry of Materials Lab, Department of Physics, University Mohamed Boudiaf of M'sila, 28000, M'sila, Algeria

author

H. Belhouchet

• Laboratoire des Matériaux non Métalliques, I. O. M. P, Université Ferhat Abbas Sétif 1, 19000, Sétif, Algeria

author

A. Raghdi

• Physics and Chemistry of Materials Lab, Department of Physics, University Mohamed Boudiaf of M'sila, 28000, M'sila, Algeria

author

A. Ouali

• Physics and Chemistry of Materials Lab, Department of Physics, University Mohamed Boudiaf of M'sila, 28000, M'sila, Algeria

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Identifiers

DOI

10.12693/APhysPolA.131.139