Interpretation of Quasi-Isothermal Thermogravimetric Weight Curves

Ole Toft Sørensen

    Research output: Contribution to journalJournal articleResearchpeer-review


    Quasi-isothermal analysis (QIA) is a very useful technique. Compared to conventional non-isothermal thermogravimetry, close-lying reactions can easily be separated by use of this method and kinetic data can be obtained for each intermediate reaction in a single run. This paper discusses the shape of the weight and temperature curves expected in QIA for different controlling mechanisms, and a method is given for calculating the activation energies from these curves. As an example, the QIA curves obtained in thermal decomposition of ammonium-uranyl carbonate (AUC) are analysed and the kinetics of some of the intermediate reactions are determined.
    Original languageEnglish
    JournalThermochimica Acta
    Issue number2
    Pages (from-to)211-214
    Publication statusPublished - 1979


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