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Extending the applicability of TG measurements to industry and to quality ensuring by dimensionless analysis

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Abstract

TheI i=E i/RT i dimensionless evaluation is very suitable for describing the TG measurements according to theE i/RT i=lnA +n[ln(1−α)i]−ln(dα/dr)i equation. TheI i andE i functions make the comparison of the different TG measurements possible quantitatively in the case of more DTG peaks as well.

TheI i andE i values as function of (1-α)i and 1/T i open new way for further theoretical and practical studies by TG measurements. Such types of results are the quantitative determination of the effect of the measuring conditions, the measuring of the mechanochemical effect of grinding and among others the explanation of the self-hardening process of fly ashes of power stations.

Strict connections exist between theI i functions and the constants of the compensation effect (CE). These constants (tanα, axis intersect) can be calculated directly from the average of the measured data of theI i function making the introduction and theoretical and practical application of the idea of ‘general activation energy’ (¯E) possible. The quantitative characterisation of the examined materials of the fine structure ofCE and of the thermal processes together proves the extending importance of TG measurements from industrial and material qualification aspects as well.

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Authors and Affiliations

  1. Department of Chemical Technology, Technical University of Budapest, H-1521, Budapest, Hungary

    Z. Adonyi

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  1. Z. Adonyi
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The author thanks gratefully to Professor Márta Fehér mathematicien, Head of the Department of Philosophy at the Technical University of Budapest for the consultations and for the encouragements.

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Adonyi, Z. Extending the applicability of TG measurements to industry and to quality ensuring by dimensionless analysis. Journal of Thermal Analysis 47, 577–588 (1996). https://doi.org/10.1007/BF01983999

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