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Thermal percolation and electrical insulation in composite materials with partially metallic coated fillers

Autor: Zhong, Jinxin, Xi, Qing, He, Jixiong, Liu, Jun, Zhou, Jun

We propose a type of thermal interface materials incorporating insulating nanowires with partially metallic coating in insulating polymer matrix.Large thermal conductivity can be obtained due to thermal percolation while the electrical insulation is

Externí odkaz: http://arxiv.org/abs/2109.09921

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Revisiting the Reduction of Thermal Conductivity in Nano- to Micro-Grained Bismuth Telluride: The Importance of Grain-Boundary Thermal Resistance

Autor: Wang, Sien, Lu, Xiaowei, Negi, Ankit, He, Jixiong, Kim, Kyunghoon, Shao, Hezhu, Jiang, Peng, Liu, Jun, Hao, Qing

Nanograined bulk alloys based on bismuth telluride (Bi2Te3) are the dominant materials for room-temperature thermoelectric applications. In numerous studies, existing bulk phonon mean free path (MFP) spectra predicted by atomistic simulations suggest

Externí odkaz: http://arxiv.org/abs/2108.05972

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A Ubiquitous Thermal Conductivity Formula for Liquids, Polymer Glass, and Amorphous Solids

Autor: Xi, Qing, Zhong, Jinxin, He, Jixiong, Xu, Xiangfan, Nakayama, Tsuneyoshi, Wang, Yuanyuan, Liu, Jun, Zhou, Jun, Li, Baowen

Publikováno v: Chin. Phys. Lett. 2020, 37 (10): 104401

The microscopic mechanism of thermal transport in liquids and amorphous solids has been an outstanding problem for a long time. There have been several different approaches to explain the thermal conductivities for these systems, for example, the Bri

Externí odkaz: http://arxiv.org/abs/2005.00217

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A Thermal Resistance Network Model for Heat Conduction of Amorphous Polymers

Autor: Zhou, Jun, Xi, Qing, He, Jixiong, Xu, Xiangfan, Nakayama, Tsuneyoshi, Wang, Yuanyuan, Liu, Jun

Publikováno v: Phys. Rev. Materials 4, 015601 (2020)

Thermal conductivities (TCs) of the vast majority of amorphous polymers are in a very narrow range, 0.1 $\sim$ 0.5 Wm$^{-1}$K$^{-1}$, although single polymer chains possess TC of orders-of-magnitude higher. Entanglement of polymer chains plays an imp

Externí odkaz: http://arxiv.org/abs/1909.07607

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