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Kinetic analysis of particle-size based complex kinetic processes

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Datum publikování

2020

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Vydavatel

Elsevier Science BV

Abstrakt

Complex kinetic data arbitrarily created by measuring (calorimetrically) crystallization of mixed selenium powders with different defined particle sizes were evaluated by the three standard approaches to complex kinetic analysis. Performance of the three tested approaches was tested by comparison with the kinetic results obtained for the separate powder fractions. The additivity of the kinetic signals was verified. Single-process methods of kinetic analysis provided qualitative and quantitative information about the temperature dependence of activation energy E and estimation of the ratio between intensities of the involved sub-processes I-1/I-2. Mathematic deconvolution approach well reflected the correct model-free and model-based kinetics for the partial overlaps. However, it required iterative processing and additional supplemental information about the nature of the sub-processes in case of the evaluation of fully overlapping data. Kinetic deconvolution based on single-curve non-linear optimization utilizing the fixed E values obtained independently provided very good results for both, partial and full overlaps.

Rozsah stran

"119903-1"-"119903-13"

ISSN

0022-3093

Trvalý odkaz na tento záznam

Projekt

GA17-11753S/Kinetická analýza komplexních fyzikálně chemických procesů

Zdrojový dokument

Journal of Non-Crystalline Solids, volume 533, issue: April

Vydavatelská verze

https://www.sciencedirect.com/science/article/pii/S002230932030020X?via%3Dihub

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open access

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Klíčová slova

complex kinetic analysis, particle size, DSC, selenium glass, deconvolution, komplexní kinetická analýza, velikost částic, DSC, amorfní Se, dekonvoluce

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Except where otherwised noted, this item's license is described as open access