Elsevier

Thermochimica Acta

Volume 19, Issue 3, June 1977, Pages 305-317
Thermochimica Acta

Thermal decomposition reactions of solids controlled by diffusion and phase-boundary processes: possible misinterpretation of the mechanism from thermogravimetric data

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Abstract

A comparative study of phase -boundary and diffusion-controlled reactions has been carried out using thermogravimetric data. The results reported support the hypothesis that a single TG diagram does not allow the determination of whether a solid decomposition reaction is controlled by a diffusion mechanism or governed by the movement of an interface coming from a nucleation process. However, the analysis of both a single TG diagram and an isothermal curve might be a quick and valid way for discerning between these mechanisms. These statements are confirmed by studying the thermal decomposition kinetics of Ba(OH)2 and CaCO3.

References (18)

  • J.M. Criado et al.

    Thermochim. Acta

    (1975)
  • J.M. Criado et al.

    Thermochim Acta.

    (1976)
  • J. Sestak

    Thermochim. Acta

    (1971)
  • V. Sataya
  • J.M. Criado et al.

    Anal. Quim

    (1974)
  • J.H. Sharp et al.

    Anal. Chem

    (1969)
  • T.A. Clarke et al.

    Chem. Comm.

    (1969)
  • J.M. Criado, F. Gonzalez and J. Morales, Anal. Quim., in...
  • J.M. Criado et al.

    J. Therm. Anal.

    (1976)
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