Publication detail

Crystallization kinetics in Se70Te30 glass

Authors: Svoboda Roman | Barták Jaroslav | Málek Jiří

Year: 2010

Type of publication: ostatní do riv

Name of source: Abstract Book - 10th European Symposium on Thermal Analysis and Calorimetry

Publisher name: Dutch Society for Thermal Analysis and Calorimetry

Place: Rotterdam

Page from-to: 54-54

Titles:

Language	Name	Abstract	Keywords
cze	Krystalizační kinetika ve skle Se70Te30	V práci je popsána krystalizační kinetika Se70Te30. Byly studovány vzorky ve formě prášku nebo leštěných kousků. Pomocí DSC za neizotermních podmínek. Pro všechna měření byla provedena úplná kinetická analýza a byly zjištěny paramerty krystalizace jako jsou aktivační energie, předeexponenciální faktor a kinetický model. Kinetický model byl stanoven na JMA 1.	krystalizace, kinetika; Se-Te; sklo
eng	Crystallization kinetics in Se70Te30 glass	In this work the crystallization kinetics of a chosen composition (x = 0.3) in the Se1-xTex glassy system is described. Bulk glass was prepared by a classical melt-quenching technique and was grinded to a fine powder with particle size 125 – 180 μm afterwards. The crystallization kinetics of the prepared glass was studied by differential scanning calorimetry technique under non-isothermal conditions for heating rates 0.5 – 30 K∙min-1. Full kinetic analysis (i.e. determination of the activation energy of the crystallization process, suggestion of an appropriate kinetic model, and determination of the pre-exponential kinetic factor) was done for all measured samples. The activation energy determined by the Kissinger and Ozawa methods was found to be Ec = 148 ± 1.5 kJ•mol-1. The experimental data were then interpreted in terms of the Johnson-Mehl-Avrami (JMA) nucleation-growth model4-6, the parameter of this model was found to be n = 1.	crystallization; kinetics; Se-Te; glass

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