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Study of natural and ion exchanged vermiculite by emanation thermal analysis, TG, DTA and XRD
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SYSNO ASEP 0163512 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Study of natural and ion exchanged vermiculite by emanation thermal analysis, TG, DTA and XRD Author(s) PŞez-Maqueda, L. A. (ES)
Balek, V. (CZ)
Poyato, J. (ES)
Pérez-Rodriquez, J. L. (ES)
Šubrt, Jan (UACH-T) SAI, RID
Boutsewa, I. M. (RU)
Beckman, I. N. (RU)
Málek, Z. (CZ)Source Title Journal of Thermal Analysis and Calorimetry. - : Akadémiai Kiadó - ISSN 1388-6150
Roč. 71, č. 3 (2003), s. 715-726Number of pages 12 s. Language eng - English Country NL - Netherlands Keywords emanation thermal analysis ; DTA ; ion exchange Subject RIV CA - Inorganic Chemistry R&D Projects LN00A028 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z4032918 - UACH-T Annotation Emanation thermal analysis (ETA), thermogravimetry, DTA and XRD were used in thermal characterization of natural vermiculite (Santa Olalla, Huelva, Spain) and of Na+- and NH4+- exchanged vermiculite samples during heating in air in the range 25-1100degreesC. A good agreement between the results of these methods was found. Changes in the radon release rate measured by ETA, which reflected the decrease and collapse of the interlayer space after the release of water as well as the formation of new crystalline phases were evaluated using a mathematical model. The model used for the evaluation was found suitable for the quantitative characterization of microstructure changes during in situ conditions of heating of vermiculite samples. Workplace Institute of Inorganic Chemistry Contact Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Year of Publishing 2004
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