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DECONVOLUTION OF COMPLEX CRYSTALLIZATION PROCESSES: AMORPHOUS SELENIUM
Year: 2012
Type of publication: článek v odborném periodiku
Name of source: Scientific Papers of the University of Pardubice, Series A, Faculty of Chemical Technology
Publisher name: Univerzita Pardubice
Place: Pardubice
Page from-to: 67-90
Titles:
Language Name Abstract Keywords
cze Dekonvoluce komplexních krystalizačních procesů: amorfní selen Krystalizační chování skelného selenu bylo studováno pomocí DSC metody. Dvě přiblížení k vývoji krystalizační kinetiky byla použita: 1. pokročilá interpretace charakteristických kinetických funkcí, 2. modifikovaná Fraser-Suzuki dekonvoluce. Stanovené kinetické parametry v závislosti na velikosti částic daly informaci o povaze a vlivu povrchové a objemové krystalizace. krystalizace; DSC; selen; dekonvoluce
eng DECONVOLUTION OF COMPLEX CRYSTALLIZATION PROCESSES: AMORPHOUS SELENIUM Crystallization behavior of the selenium glass was studied by means of the differential scanning calorimetry under non-isothermal conditions. Two new approaches to the evaluation of crystallization kinetics — advanced interpretation of characteristic kinetic functions and modified Fraser–Suzuki deconvolution — were applied. The determination of kinetic parameters in the dependence on particle size can provide an extensive amount of information about the nature of the involved surface and bulk crystallization mechanisms. Based on these information, the deconvolution in terms of the Johnson–Mehl–Avrami process was performed, separating the two mechanisms. The results not only both, qualitatively and quantitatively, describe the crystallization process in glassy selenium but also explain various data from literature on this topic. Introduced deconvolution may represent a new approach to gaining information about complex crystallization processes for numerous material science applications. crystallization; DSC; selenium; deconvolution

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