Se78-xTe20Sn2Inx (x = 0,2,4,6)硫系玻璃(ChGs)结晶机理的反应动力学研究:组分效应的见解

IF 1.5 4区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY
Kaushal Kumar Sarswat, Sangeeta Singh, Neeraj Mehta
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引用次数: 0

摘要

本文研究了Se78−xTe20Sn2Inx (x = 0,2,4,6)硫系玻璃(ChGs)在非等温条件下的结晶动力学,以评价铟掺入的影响。差示扫描量热法(DSC)在5-20 K/min的加热速率下进行。采用Kissinger-Akahira-Sunose (KAS)和Vyazovkin-Horner-Rogers (VHR)等转换方法提取动力学参数。结果表明,In的掺杂显著改变了材料的热稳定性和结晶动力学。STSI-1 (x = 2)表现出最高的初始活化能(230.0 kJ/mol),降低了48.29%,表明结晶阻力明显降低。相比之下,未掺杂样品(STS)仅下降20.3%。STSI-1的Avrami指数(n)和结晶焓(ΔH)也最高,表明成核生长机制发生了改变,能量需求更高。掺杂样品的结晶温度(Tc)较低,表明结晶效率提高。lnk0和Ea之间的相关性支持Meyer-Neldel规则(MNR)和等动力学关系(IKR),证实了一致的动力学行为。这些发现强调了成分在调整STSI玻璃的结晶行为方面的关键作用,用于潜在的相变和热管理应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Investigating Reaction Kinetics of Crystallization Mechanism in Se78-xTe20Sn2Inx (x = 0, 2, 4, 6) Chalcogenide Glasses (ChGs): Insights into Compositional Effects

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.

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来源期刊
Brazilian Journal of Physics
Brazilian Journal of Physics 物理-物理:综合
CiteScore
2.50
自引率
6.20%
发文量
189
审稿时长
6.0 months
期刊介绍: The Brazilian Journal of Physics is a peer-reviewed international journal published by the Brazilian Physical Society (SBF). The journal publishes new and original research results from all areas of physics, obtained in Brazil and from anywhere else in the world. Contents include theoretical, practical and experimental papers as well as high-quality review papers. Submissions should follow the generally accepted structure for journal articles with basic elements: title, abstract, introduction, results, conclusions, and references.
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