Controlled rate thermal analysis of sepiolite

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12 Citations (Scopus)


Controlled rate thermal analysis (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.

Original languageEnglish
Pages (from-to)749-755
Number of pages7
JournalJournal of Thermal Analysis and Calorimetry
Issue number3
Publication statusPublished - Dec 2009


  • Attapulgite
  • CRTA
  • Palygorskites
  • Sepiolite
  • Thermal analysis
  • Thermogravimetry

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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