THERMOMECHANICAL ANALYSIS OF ILLITE FROM FÜZÉRRADVÁNY

• Main Authors: Tomáš Húlan, Anton Trník, Igor Štubňa, Peter Bačík, Tiit Kaljuvee, Libor Vozár
• Format: Article
• Language: English
• Published: Kaunas University of Technology 2015-09-01
• Series: Medžiagotyra
• Subjects: illite; Young's modulus; physically bound water; dehydroxylation; sintering
• Online Access: http://matsc.ktu.lt/index.php/MatSc/article/view/7152
• ISSN: 1392-1320; 2029-7289

<p>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.</p><p>DOI: <a href="http://dx.doi.org/10.5755/j01.ms.21.3.7152">http://dx.doi.org/10.5755/j01.ms.21.3.7152</a></p>