Emanation thermal analysis study of Na-montmorillonite and montmorillonite saturated with various cations

V. Balek*, M. Beneš, Z. Málek, G. Matuschek, A. Kettrup, S. Yariv

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Emanation thermal analysis (ETA) and thermogravimetry measured in the range 20-1000°C was used to characterize the thermal behaviour of Na-montmorillonite (Upton Wyoming, USA) and homoionic montmorillonite samples prepared by saturation with cations Li+ , Mg2+ , Al 3+ , respectively. It was confirmed that the presence of cations used for montmorillonite saturation (Li+ , Mg2+ , Al 3+ ) influenced the thermal behaviour of the samples. The results that indicated the decrease of radon release rate corresponding to a collapse of the interlayer space between the silicate sheets after water release and the crystallization of meta-montmorillonite in the respective temperature intervals were compared. From the ETA results it followed that the thermal stability of intermediate microstructure depends on the type of exchanged cation. A mathematical model was used to evaluate the ETA data.

Original languageEnglish
Pages (from-to)617-623
Number of pages7
JournalJournal of Thermal Analysis and Calorimetry
Volume83
Issue number3
DOIs
StatePublished - Mar 2006

Keywords

  • Al
  • Emanation thermal analysis
  • Meta-montmorillonite
  • Mg
  • Microstructure
  • Na-montmorillonite
  • Saturation with Li
  • Thermal behaviour
  • Thermogravimetry

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