Thermal behaviour of ground vermiculite |
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| Authors: | V Balek J L Pérez-Rodríguez L A Pérez-Maqueda J Šubrt J Poyato |
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| Institution: | (1) Institute of Inorganic Chemistry, AS CR, 25068 Řež, Czech Republic;(2) Instituto de Ciencia de Materiales de Sevilla (CSIC-UNSE), Avda. Americo Vespucio s/n, 41092 Sevilla, Spain |
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| Abstract: | Thermal behaviour of natural vermiculite (Santa Olalla, Huelva, Spain) was investigated by TG, DTA, emanation thermal analysis
(ETA) and high temperature XRD on heating in the temperature range from 30 to 1100°C before and after vibratory mill grinding.
Microstructure changes of natural and ground vermiculite samples were characterized by using ETA under in situ conditions
of heating. By comparing the ETA and XRD results it was demonstrated that a decrease of radon release rate measured by ETA
characterized the decrease in the interlayer spacing of the vermiculite samples that followed the dehydration.
Dedicated to the memory of Professor Dr. Ferenc Paulik who passed away on October 12, 2005. |
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| Keywords: | differential thermal analysis emanation thermal analysis grinding interlayer spacing thermogravimetry vermiculite XRD |
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