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Title: Crystallization kinetics of Si20Te80?xBix (0???x???3) chalcogenide glasses
Authors: Fernandes, B.J.
Ramesh, K.
Udayashankar, N.K.
Issue Date: 2019
Citation: Materials Science and Engineering B: Solid-State Materials for Advanced Technology, 2019, Vol.246, , pp.34-41
Abstract: In this report, we investigate the crystallization kinetics of Si20Te80?xBix (0 ? x ? 3) chalcogenide glassy systems using differential scanning calorimetry (DSC) technique. Systematic studies are carried out in order to understand the variation of thermal parameters such as glass transition temperature (Tg), onset crystallization temperature (Tc) and peak crystallization temperature (Tp) as a function of composition. Activation energy for glass transition (Eg) and crystallization (Ec) has been calculated based on the relevant statistical methods. Furthermore, thermal parameters such as change in specific heat (?Cp), fragility index (F), thermal stability (?T)& (S), enthalpy (?Hc), entropy (?S) are deduced to interpret distinct material behaviour as a function of composition. Structural evaluation like thermal devitrification studies elucidate the restricted glass formability of the studied glass system. Conclusively, a relationship has been established between the obtained thermal parameters and electrical switching characteristics. 2019 Elsevier B.V.
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