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 language | English |
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Pages (from-to) | 617-623 |
Number of pages | 7 |
Journal | Journal of Thermal Analysis and Calorimetry |
Volume | 83 |
Issue number | 3 |
DOIs | |
State | Published - Mar 2006 |
Keywords
- Al
- Emanation thermal analysis
- Meta-montmorillonite
- Mg
- Microstructure
- Na-montmorillonite
- Saturation with Li
- Thermal behaviour
- Thermogravimetry