An Atomic Level Investigation of Grain-Size-Dependent Thermal Conductivity of Polycrystalline Argon by Molecular Dynamics

Ju, Shenghong; Liang, Xin-Gang

doi:10.1007/s10765-013-1556-2

Cited by 1 publication

(1 citation statement)

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“…These measurement methods would make contributions to the understanding of the phonon transmission phenomenon at the sintered interface in future. Several works employed MD simulations to analyze heat-transfer phenomenon in sintered nanocrystals [154][155][156][157][158]. However, the size and number of the nanocrystals are limited due to the computational cost.…”

Section: Phonon-boundary Scattering In Nanocrystalsmentioning

confidence: 99%

Tuning phonon transport spectrum for better thermoelectric materials

Hori

Shiomi

2018

Science and Technology of Advanced Materials

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The figure of merit of thermoelectric materials can be increased by suppressing the lattice thermal conductivity without degrading electrical properties. Phonons are the carriers for lattice thermal conduction, and their transport can be impeded by nanostructuring, owing to the recent progress in nanotechnology. The key question for further improvement of thermoelectric materials is how to realize ultimate structure with minimum lattice thermal conductivity. From spectral viewpoint, this means to impede transport of phonons in the entire spectral domain with noticeable contribution to lattice thermal conductivity that ranges in general from subterahertz to tens of terahertz in frequency. To this end, it is essential to know how the phonon transport varies with the length scale, morphology, and composition of nanostructures, and how effects of different nanostructures can be mutually adopted in view of the spectral domain. Here we review recent advances in analyzing such spectral impedance of phonon transport on the basis of various effects including alloy scattering, boundary scattering, and particle resonance.

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