热传输在克拉特酸盐水合物中受客频率和主机与客的相互作用控制
Chengyang Yuan1, Zhongyin Zhang2, Jie Zhu1
1Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian, Liaoning 116024, People's Republic of China.
The journal of physical chemistry letters
|August 23, 2023
概括
结晶化合物中的客原子通过散射传热声子,显著降低了导热率 (κ). 这项研究揭示了客人诱导的晶格动力学和相互作用如何降低类酸盐水合物中的导热率.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 热力学是一种热力学.
背景情况:
- 宿主-客体结晶化合物中有限的晶格导热率 (κ) 对能源应用至关重要.
- 了解超低 κ背后的机制是一个持续的研究挑战.
研究的目的:
- 为了研究客人触发的内在超低 κ 在类克拉酸盐水合物中.
- 阐明客原子在声子散射和晶格动态中的作用.
主要方法:
- 使用时间域热反射率 (TDTR) 进行实验测量.
- 采用理论计算来分析格子动力学和声子相互作用.
主要成果:
- 观察到局部客户模式与声学分支的混合化,限制了声学 κ.
- 确定了诱导宽频声子散射的客填充物,通过增强的相位空间和主机-客的不和性.
- 证明低客人频率和强大的主机-客人互动是最大限度地减少 κ. 关键.
结论:
- 揭露了客人诱导的热导率降低的占主导因素.
- 突出了客人频率,主机-客人互动和 κ最小化中的合的不同作用.
- 为设计高效的热电和热管理材料提供了见解.
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