NDLI: The effect of Se ↔ Te substitution on crystallisation micro-mechanisms evincing in GeTe$

Content Provider	Springer Nature Link
Author	Svoboda, Roman Brandová, Daniela Beneš, Ludvík Málek, Jiří
Copyright Year	2015
Abstract	Isothermal and non-isothermal crystallisation behaviour of the GeTe$_{3.9}$Se$_{0.1}$ chalcogenide glass was studied dependent on particle size and compared to the similar DSC study performed for the pure GeTe$_{4}$ material. The effect of the Se ↔ Te substitution led to a decrease in the crystallisation process complexity in the case of powdered materials—the addition of Se led to domination of the slower nucleation–growth crystallisation mechanism over the fast autocatalytic growth from mechanically induced defects. The nature of the crystallisation mechanisms was confirmed by infrared microscopy and XRD. The addition of selenium into the GeTe$_{4}$ matrix caused an enlargement of the identified crystallites; this, together with the overall deceleration of the crystallisation processes, indicates the suppression of nucleation processes. The presence of Se also greatly enhanced domination of the CNT-based three-dimensional growth of volume-located crystallites. The obtained findings provide a very good explanation for the markedly increased thermal stability of Se-doped Ge–Te infrared glasses.
Starting Page	205
Ending Page	219
Page Count	15
File Format	PDF
ISSN	13886150
Journal	Journal of thermal analysis
Volume Number	123
Issue Number	1
e-ISSN	15882926
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-08-14
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Crystallisation kinetics DSC Infrared microscopy XRD GeTe$_{3.9}$Se$_{0.1}$ Se–Te substitution Physical Chemistry Analytical Chemistry Polymer Sciences Inorganic Chemistry Measurement Science and Instrumentation
Content Type	Text
Resource Type	Article
Subject	Physical and Theoretical Chemistry Condensed Matter Physics

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