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 SM ISO690:2012ŠTRBAC, Goran, PETROVIĆ, Jelena, ŠTRBAC, Dragana, ČAJKO, Kristina, LUKIĆ-PETROVIĆ, Svetlana. Glass transition kinetics and fragility index of chalcogenides from the Ag-As-S-Se system. In: Central and Eastern European Conference on Thermal Analysis and Calorimetry, Ed. 4, 28-31 august 2017, Chişinău. Germany: Academica Greifswald, 2017, Editia 4, p. 208. ISBN 978-3-940237-47-7. |
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| Central and Eastern European Conference on Thermal Analysis and Calorimetry Editia 4, 2017 |
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Conferința "Central and Eastern European Conference" 4, Chişinău, Moldova, 28-31 august 2017 | ||||||
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| Pag. 208-208 | ||||||
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The heating rate dependence of the glass transition temperature was investigated by differential scanning calorimetry for the chalchogenide glasses from the Agx(As2(S0.5Se0.5)3)100-x system for x=0, 0.5, 2 and 3 at. %. According this dependance apparent glass transition activation energies Eg were calculated for different defined glass transition temperatures (onset Tg1, midpoint Tg2, endpoint Tg3 and endset Tg4) [1, 2, 3]. Also, Eg was analyzed using isoconversional (model free) method [4, 5, 6]. The results showed that the activation energy is not constant during the investigated process, but vary with the degree of transformation from the glassy to the supercooled liquid phase, pointing out that it was a complicated, multi-step process. The values of the fragility index showed that these glasses do not exhibit large configurational changes during the glass transition process. Influence of silver content on investigated parameters was discussed. |
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