The non-isothermal kinetics of cordierite formation in mechanically activated talc–kaolinite–alumina ceramics system

The non-isothermal kinetics of cordierite formation from both non-activated and mechanically activated kaolinite + talc + alumina ceramic system was studied by differential thermal analysis (DTA). The mixture of kaolinite, talc and alumina was activated mechanically in a planetary mill, while amorph...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2016-08, Vol.125 (2), p.803-808
Main Authors: Yürüyen, Süha, Toplan, Nil, Yildiz, Kenan, Özkan Toplan, H.
Format: Article
Language:English
Subjects:
Activation energy
Aluminum oxide
Analysis
Analytical Chemistry
Ceramic materials
Ceramics
Chemistry
Chemistry and Materials Science
Clay minerals
Diffraction
Inorganic Chemistry
Measurement Science and Instrumentation
Physical Chemistry
Polymer Sciences
X-rays
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Summary:The non-isothermal kinetics of cordierite formation from both non-activated and mechanically activated kaolinite + talc + alumina ceramic system was studied by differential thermal analysis (DTA). The mixture of kaolinite, talc and alumina was activated mechanically in a planetary mill, while amorphisation in the kaolinite, talc and alumina structure was studied by X-ray diffraction analysis. The activation energies depending on the conversion for cordierite formation were calculated from the DTA curves by using the non-isothermal method of Coats and Redfern at heating rates of 5, 10, 15 and 20 °C min −1 . The mechanical activation of the kaolinite, talc and alumina mixture resulted in the decrease in activation energy values for cordierite formation.
ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-016-5277-1