Phase Transformation and Sintering of Algeria Clay Powder

• Authors: L. Beddiar , F. Sahnoune , M. Heraiz , D. Redaoui
• Languages of publication: EN

Abstracts

EN

Clay is one of the most used natural materials in the ceramic industry with various applications such as pottery, tiles, cement and bricks. The latter are used as a building material because of their excellent thermal and mechanical properties. In the present study, Algerian clay from Al-maathed area, M'sila district, was used to prepare bricks. The chemical composition of the clay was determined using X-ray fluorescence. Firing of clay was carried out in the temperature range 20-1000°C, at different heating rates. The present phases and their transformations, the activation energy, and the sintering mechanism were evaluated using X-ray diffraction, differential thermal analysis, thermogravimetric analysis and dilatometry. The activation energy for the sintering mechanism obtained from non-isothermal treatments is 420 kJ/mol. The value of the Avrami exponent, n, is determined from the shape of the crystallization exothermic dependence. It is related to m parameter (a numerical factor which depends on the dimensionality of crystal growth) obtained by Matusita method. Both of which are about 1.2 for clay sintering. These values indicate that bulk nucleation is dominant in clay sintering by three-dimensional growth, with polyhedron-like morphology controlled by interface reaction.

Keywords

EN

81.05.Mh; 81.70.Pg; 81.30.Mh

Discipline

• 81.05.Mh: Cermets, ceramic and refractory composites
• 81.30.Mh: Solid-phase precipitation(for precipitation hardening, see 81.40.Cd)
• 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: 3
• Pages: 566-568

Dates

published

2017-03

Contributors

author

L. Beddiar

• Department of Material Science, Faculty of Exact Science and Science of the Nature and Life, University Mohamed Khaiddar Beskra, Algeria

author

F. Sahnoune

• Physics and Chemistry of Materials Lab, Department of Physics, University of M'sila, 28000, M'sila, Algeria
• Research Unit on Emerging Materials (RUEM), Ferhat Abbas of Setif 01, Setif 19000, Algeria

author

M. Heraiz

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

author

D. Redaoui

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

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Identifiers

DOI

10.12693/APhysPolA.131.566