银/铜基复杂晶体结构矿物的热电性,其固有的低导热性

IF 2.9 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Kewal Singh Rana, A. Soni
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引用次数: 2

摘要

固有较差的晶格热导率(κL)在热电、电子产品中的热管理、隔热涂层和耐火材料等应用中非常受欢迎。最近,复杂的晶体材料由于各种有趣的潜在物理现象而引起了科学界的重视,这些物理现象解释了其独特的热性质。在这篇综述中,我们讨论了各种有趣的概念及其导致复杂块状硫族化物矿物中超低κL的结果,该矿物具有用于载热声子的多个散射通道。这篇综述的主要焦点是具有低热容量和阳离子类液体超离子传导的Ag和Cu基大晶胞结构。这些材料的Ag/Cu亚晶格遵循了声子-液晶的概念,极大地减少了声子的传输并增强了散射过程。晶胞中大量原子的存在导致晶格内声学声子截止频率低、声光声子散射强、声速差和晶体非谐性强。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Thermoelectricity in Ag/Cu based complex crystal structure minerals with inherent low thermal conductivity
Inherently poor lattice thermal conductivity (κL) is highly desired for applications like thermoelectricity, thermal management in electronics, thermal barrier coatings and refractories. Recently, complex crystalline materials have drawn serious scientific attention because of various interesting underlying physical phenomena which explain the unique thermal properties. In this review, we have discussed various interesting concepts and their consequences leading to ultralow κL in complex bulk chalcogenide minerals having multiple scattering channels for heat carrying phonons. The primary focus of this review is on the Ag and Cu based large unit cell structures with low heat capacity and a liquid-like superionic conduction of cations. The Ag/Cu sublattice of these materials that followed the phonon-liquid electron crystal concept strongly reduces the transportation of phonons and enhances the scattering process. The presence of large number of atoms in the unit cell result in low acoustic phonons cut-off frequency, robust acoustic-optical phonons scattering, poor sound velocity and strong crystal anharmonicity inside the crystalline lattice.
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来源期刊
CiteScore
3.60
自引率
0.00%
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审稿时长
7 weeks
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