Journal of Materials Science

, Volume 18, Issue 7, pp 2117–2125 | Cite as

Critical examination of the DTA techniques used to study the kinetics of solid-state transformations

  • J. Morales
  • L. Hermán
  • M. Macias
  • A. Ortega
Papers

Abstract

The use of the different equations proposed to study the kinetics of the glass-to-crystal transition from DTA curves has been extended to include the evaluation of the kinetic parameters of polymorphic transitionS. The transformation kinetics of CaCO3 (aragonite to calcite) and PbO (litharge to massicot) are the examples studied. The kinetic results of both transformations, obtained by the analysis of DTA curves, differ widely from those revealed by the analysis of the isothermal kinetic data. This discrepancy is probably due to erroneous simplifications used in deriving the equations applied in non-isothermal conditions.

Keywords

Polymer Calcite Kinetic Parameter CaCO3 Kinetic Data 

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Copyright information

© Chapman and Hall Ltd. 1983

Authors and Affiliations

  • J. Morales
    • 1
  • L. Hermán
    • 1
  • M. Macias
    • 2
  • A. Ortega
    • 2
  1. 1.Departamento de Química Inorganica, Facultad de CienciasUniversidad de CordobaSpain
  2. 2.Departamento de Química Inorganica, Facultad de QuimicasUniversidad de SevillaSpain

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