期刊
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
卷 98, 期 2, 页码 423-428出版社
SPRINGER
DOI: 10.1007/s10973-009-0321-z
关键词
Attapulgite; Sepiolite; Palygorskites; Thermal analysis; CRTA; Thermogravimetry
资金
- Hungarian Scientific Research Fund (OTKA) [K62175]
- Queensland University of Technology Inorganic Materials Research Program
- CRC
CRTA technology offers better resolution and a more detailed interpretation of the decomposition processes of a clay mineral such as sepiolite via approaching equilibrium conditions of decomposition through the elimination of the slow transfer of heat to the sample as a controlling parameter on the process of decomposition. Constant-rate decomposition processes of non-isothermal nature reveal changes in the sepiolite as the sepiolite is converted to an anhydride. In the dynamic experiment two dehydration steps are observed over the similar to 20-170 and 170-350 A degrees C temperature range. In the dynamic experiment three dehydroxylation steps are observed over the temperature ranges 201-337, 337-638 and 638-982 A degrees C. The CRTA technology enables the separation of the thermal decomposition steps.
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