Controlled rate thermal analysis of sepiolite
Frost, Ray L., Kristof, Janos, & Horvath, Erzsebet (2009) Controlled rate thermal analysis of sepiolite. Journal of Thermal Analysis and Calorimetry, 98(2), pp. 423-428.
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Abstract
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 ~20-170 and 170-350°C temperature range. In the dynamic experiment three dehydroxylation steps are observed over the temperature ranges 201-337, 337-638 and 638-982°C. The CRTA technology enables the separation of the thermal decomposition steps.
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