THERMOMECHANICAL ANALYSIS OF ILLITE FROM FÜZÉRRADVÁNY

Authors

  • Tomáš Húlan Physics Department, Constantine the Philosopher University in Nitra
  • Anton Trník Physics Department, Constantine the Philosopher University in Nitra; Department of Materials Engineering and Chemistry, Czech Technical University
  • Igor Štubňa Physics Department, Constantine the Philosopher University in Nitra
  • Peter Bačík Department of Mineralogy and Petrology, Comenius University
  • Tiit Kaljuvee Laboratory of Inorganic Materials, Tallinn Technical University
  • Libor Vozár Physics Department, Constantine the Philosopher University in Nitra

DOI:

https://doi.org/10.5755/j01.ms.21.3.7152

Keywords:

illite, Young's modulus, physically bound water, dehydroxylation, sintering

Abstract

Young’s modulus of green illite from Füzérradvány (Hungary) was measured in-situ in the temperature interval 20 °C – 1100 °C and auxiliary analyses DTA, TG and TDA, XRD and EGA, were also performed. It was found that a removal of the physically bound water (20 °C – 250 °C) sets illite crystals closer which leads to a significant increase of Young’s modulus from its initial value of 7 GPa and reaches the maximum 12 GPa at 300 °C. Young’s modulus slightly decreases in the temperature interval of dehydroxylation of illite (300 °C – 800 °C), and which then reaches up to 45 GPa at 1100 °C, increasing exponentially as a consequence of the sintering above 800 °C.

DOI: http://dx.doi.org/10.5755/j01.ms.21.3.7152

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Published

2015-07-27

Issue

Vol. 21 No. 3 (2015)

Section

CERAMICS AND GLASSES

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