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<p>This study investigates the crystallization kinetics of Se<sub>78−x</sub>Te<sub>20</sub>Sn<sub>2</sub>In<sub>x</sub> (<i>x</i> = 0, 2, 4, 6) chalcogenide glasses (ChGs) under non-isothermal conditions to evaluate the effects of indium incorporation. Differential scanning calorimetry (DSC) was performed at 5–20&#xa0;K/min heating rates. Kinetic parameters were extracted using iso-conversional methods, including Kissinger–Akahira–Sunose (KAS) and Vyazovkin–Horner–Rogers (VHR) approaches. Results revealed that In doping significantly alters thermal stability and crystallization dynamics. STSI-1 (<i>x</i> = 2) exhibited the highest initial activation energy (230.0&#xa0;kJ/mol), which decreased by 48.29%, indicating a marked reduction in crystallization resistance. In contrast, the undoped sample (STS) showed only a 20.3% drop. The Avrami index (<i>n</i>) and enthalpy of crystallization (<i>ΔH</i>) were also highest in STSI-1, suggesting altered nucleation-growth mechanisms and higher energy demand. In-doped samples showed lower crystallization temperatures (<i>T</i><sub><i>c</i></sub>), implying enhanced crystallization efficiency. A correlation between ln <i>K</i><sub><i>0</i></sub> and <i>E</i><sub><i>a</i></sub> supported the Meyer-Neldel rule (MNR) and iso-kinetic relationship (IKR), confirming consistent kinetic behavior. These findings highlight the critical role of composition in tuning the crystallization behavior of STSI glasses for potential phase-change and thermal management applications.</p>

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Investigating Reaction Kinetics of Crystallization Mechanism in Se78-xTe20Sn2Inx (x = 0, 2, 4, 6) Chalcogenide Glasses (ChGs): Insights into Compositional Effects

  • 期刊论文

  • 发表日期：

    2025年5月24日

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  • Kaushal Kumar Sarswat,
  • Sangeeta Singh,
  • Neeraj Mehta

摘要

This study investigates the crystallization kinetics of Se78−xTe20Sn2Inx (x = 0, 2, 4, 6) chalcogenide glasses (ChGs) under non-isothermal conditions to evaluate the effects of indium incorporation. Differential scanning calorimetry (DSC) was performed at 5–20 K/min heating rates. Kinetic parameters were extracted using iso-conversional methods, including Kissinger–Akahira–Sunose (KAS) and Vyazovkin–Horner–Rogers (VHR) approaches. Results revealed that In doping significantly alters thermal stability and crystallization dynamics. STSI-1 (x = 2) exhibited the highest initial activation energy (230.0 kJ/mol), which decreased by 48.29%, indicating a marked reduction in crystallization resistance. In contrast, the undoped sample (STS) showed only a 20.3% drop. The Avrami index (n) and enthalpy of crystallization (ΔH) were also highest in STSI-1, suggesting altered nucleation-growth mechanisms and higher energy demand. In-doped samples showed lower crystallization temperatures (Tc), implying enhanced crystallization efficiency. A correlation between ln K0 and Ea supported the Meyer-Neldel rule (MNR) and iso-kinetic relationship (IKR), confirming consistent kinetic behavior. These findings highlight the critical role of composition in tuning the crystallization behavior of STSI glasses for potential phase-change and thermal management applications.