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http://dx.doi.org/10.4191/kcers.2017.54.6.08

Evaluations of Sb20Se80-xGex (x = 10, 15, 20, and 25) Glass Stability from Thermal, Structural and Optical Properties for IR Lens Application  

Jung, Gun-Hong (Department of Advanced Chemicals and Engineering, Chonnam National University)
Kong, Heon (Department of Advanced Chemicals and Engineering, Chonnam National University)
Yeo, Jong-Bin (The Research Institute for Catalysis, Chonnam National University)
Lee, Hyun-Yong (School of Chemical Engineering, Chonnam National University)
Publication Information
Journal of the Korean Ceramic Society / v.54, no.6, 2017 , pp. 484-491 More about this Journal
Abstract
Chalcogenide glasses have been investigated in their thermodynamic, structural, and optical properties for application in various opto-electronic devices. In this study, the $Sb_{20}Se_{80-x}Ge_x$ with x = 10, 15, 20, and 25 were selected to investigate the glass stability according to germanium ratios. The thermal, structural, and optical properties of these glasses were measured by differential scanning calorimetry (DSC), X-ray diffraction (XRD), and UV-Vis-IR Spectrophotometry, respectively. The DSC results revealed that $Ge_{20}Sb_{20}Se_{60}$ composition showing the best glass stability theoretically results due to a lower glass transition activation energy of 230 kJ/mol and higher crystallization activation energy of 260 kJ/mol. The structural and optical analyses of annealed thin films were carried out. The XRD analysis reveals obvious results associated with glass stabilities. The values of slope U, derived from optical analysis, offered information on the atomic and electronic configuration in Urbach tails, associated with the glass stability.
Keywords
Glass; Thermal properties; Chalcogenide; Glass stability; Urbach tails;
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