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Kinetic analysis of the formation of high-temperature phases in an illite-based ceramic body using thermodilatometry

  • Tomáš Ondro
  • Tomáš Húlan
  • Omar Al-Shantir
  • Štefan Csáki
  • Tereza Václavů
  • Anton TrníkEmail author
Article
  • 2 Downloads

Abstract

A non-isothermal kinetic analysis of the sintering process of an illitic clay is studied by thermodilatometry. For this study, illitic clay with over 80 mass% of illite content, originated in the Füzérradvány location in northeastern Hungary, is used as basic material. The measurements are performed using a push-rod dilatometer on compact samples with heating rates from 1 to 10 °C min−1 in dynamic N2 atmosphere. The Kissinger method is used for the parameterization of the process. The results show that the reaction sintering runs in several overlapping steps. The determined values of the apparent activation energy of the first step and second step are EA = (625 ± 18) kJ mol−1 and EA = (575 ± 14) kJ mol−1, respectively. The results also show that both reactions could be characterized by the thickening of long cylinders (needles) or growth of needles and plates of finite long dimensions.

Keywords

Kinetics Illite Sintering Apparent activation energy 

Notes

Acknowledgements

This research was supported by the Czech Science Foundation, Grant No. GA17-16772S.

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  1. 1.Department of PhysicsConstantine the Philosopher University in NitraNitraSlovakia
  2. 2.Department of Physics of MaterialsCharles UniversityPragueCzech Republic
  3. 3.Institute of Plasma PhysicsCzech Academy of SciencesPragueCzech Republic
  4. 4.Department of Condensed Matter PhysicsCharles UniversityPragueCzech Republic
  5. 5.Department of Materials Engineering and ChemistryCzech Technical University in PraguePragueCzech Republic

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