Pressure effects on the thermal properties of graphite

doi:10.1115/IMECE201666379

IR > 机电工程学院

	Pressure effects on the thermal properties of graphite
	Cai, Shuang 1,2; Liu, Chenhan 1,2; Tao, Yi 1,2; Duan, Zaoqi 1,2; Chen, Yunfei 1,2; Dong, Yun2,3
	2016
会议名称	ASME 2016 International Mechanical Engineering Congress and Exposition, IMECE 2016
会议录名称	ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
卷号	8
会议日期	November 11, 2016 - November 17, 2016
会议地点	Phoenix, AZ, United states
出版地	THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
出版者	American Society of Mechanical Engineers (ASME)
摘要	In this paper, the thermal properties of graphite under external pressure were systematically investigated based on first-principles calculations and Boltzmann transport equation (BTE). This method is relatively simple and general to any other crystals. It was found that a compressive pressure can significantly increase the interaction between the layers in graphite and increase the phonon group velocity, the phonon mean free paths, thus the cross-plane thermal conductivity decreases. The effects of pressure on the in-plane thermal conductivity are much weaker than those on the cross-plane value. Our results indicate that the thermal properties of graphite can be strongly modulated by pressure engineering. Moreover we extracted the phonon dispersion and phonon lifetime of graphite under or without external pressure. And changes in the density of states and the cumulative thermal conductivity under 12GPa pressure are analyzed by comparing with no pressure. Our investigation here provides a physical insight into the modulation and heat transfer mechanism of graphite theoretically, which can help the design of graphitelike materials in experiment and practical application. Copyright © 2016 by ASME.
关键词	Boltzmann equation Calculations Graphite Heat transfer Phonons Pressure effects Thermal conductivity Boltzmann transport equation Compressive pressure External pressures First-principles calculation Group velocities Heat transfer mechanism Phonon dispersions Phonon mean free path
DOI	10.1115/IMECE201666379
收录类别	EI
资助项目	Gansu Science Foundation of China[2016GS09062]
语种	英语
WOS研究方向	Engineering
WOS类目	Engineering, Mechanical
WOS记录号	WOS:000400877900006
EI入藏号	20172803899793
EI主题词	Thermal Engineering
来源库	Compendex
分类代码	641.1 Thermodynamics - 641.2 Heat Transfer - 921 Mathematics - 922 Statistical Methods - 931.1 Mechanics
引用统计	被引频次[WOS]：0 [WOS记录] [WOS相关记录]
文献类型	会议论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/117445
专题	机电工程学院
通讯作者	Chen, Yunfei
作者单位	1.Southeast Univ, Sch Mech Engn, Nanjing, Jiangsu, Peoples R China 2.Southeast Univ, Jiangsu Key Lab Design & Mfg Micronano Biomed Ins, Nanjing, Jiangsu, Peoples R China 3.Lanzhou Univ Technol, Sch Mech & Elect Engn, Lanzhou, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Cai, Shuang,Liu, Chenhan,Tao, Yi,et al. Pressure effects on the thermal properties of graphite[C]. THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA:American Society of Mechanical Engineers (ASME),2016.