Publikace detail

Evaluation of glass-stability criteria for chalcogenide glasses: Effect of experimental conditions

Autoři: Svoboda Roman | Málek Jiří

Rok: 2015

Druh publikace: článek v odborném periodiku

Název zdroje: Journal of Non-Crystalline Solids

Název nakladatele: Elsevier Science BV

Místo vydání: Amsterdam

Strana od-do: 39-45

Tituly:

Jazyk	Název	Abstrakt	Klíčová slova
cze	Vyhodnocení kritéria skelné stability pro chalkogenidová skla: vliv experimentálních podmínek	Kritéria skelné stability chalkogenidových skel definovaná Hrubým, Weinbergem a Lu-Liem se ukazují být významně ovlivněna experimentálními podmínkami. Nové zpracování kritérií skelné stability bylo navrženo s respektem k experimentálním podmínkám.	skelná stabilita; sklotvornost; chalkogenidy; experimentální podmínky
eng	Evaluation of glass-stability criteria for chalcogenide glasses: Effect of experimental conditions	The Hruby, Weinberg and Lu-Liu glass-stability criteria for chalcogenide materials were for the first time demonstrated to be significantly dependent on the experimental conditions (heating rate and sample form). Origins of the heating rate and sample form dependencies were found to subsist in the magnitude of activation energies of involved thermokinetic phenomena and amount of stress/mechanically induced defects acting as crystallization centers, respectively. As-prepared bulk samples were found to be most convenient for determination of glass stability, both from reproducibility and simplicity points of view. Good empirical correlation of the glass stability and glass-forming ability was found for the three criteria and nine tested chalcogenide materials. A novel performance index evaluating invariability of the glass-stability criteria with respect to experimental conditions was introduced. It was found that the Hruby criterion exhibited the lowest normalized variability due to the experimental conditions, which confirmed the superiority of this criterion when dealing with chalcogenide glassy materials.	Glass stability; Glass-forming ability; Chalcogenides; Experimental conditions

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