Journal of thermal analysis

, Volume 46, Issue 5, pp 1339–1347 | Cite as

Investigation of dehydroxylation of gibbsite into boehmite by DSC analysis

  • J. Perić
  • R. Krstulović
  • M. Vučak


The dehydroxylation of gibbsite into boehmite was investigated by means of DSC analysis under non-isothermal conditions in the temperature range 453–673 K at heating rates from 2.5 to 20.0 K min−1. Mathematical analysis of the experimental DSC curves revealed the mechanism and kinetics of the gibbsite dehydroxylation process. The kinetic curvesα=f(t) andα=f(T) are sigmoidal in shape; their inflection points and the νm point of the curvesν=f(T) andν=f(T) are interrelated and are defined by the concept of a stationary point. The activation energy for the first stage of gibbsite dehydroxylation in the temperature range 453–673 K is 132.92±8.33–142.26±8.33 kJ mol−1.


boehmite DSC gibbsite 


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Copyright information

© Akadémiai Kiadó 1996

Authors and Affiliations

  • J. Perić
    • 1
  • R. Krstulović
    • 1
  • M. Vučak
    • 1
  1. 1.Faculty of TechnologyUniversity of SplitSplitCroatia

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