Pressure effects on the thermal properties of graphite

doi:10.1115/IMECE201666379

CORC > 兰州理工大学 > 兰州理工大学 > 机电工程学院

	Pressure effects on the thermal properties of graphite
	Cai, Shuang 1,3; Liu, Chenhan 1,3; Tao, Yi 1,3; Duan, Zaoqi 1,3; Chen, Yunfei 1,3; Dong, Yun 1,2
	2016
会议日期	November 11, 2016 - November 17, 2016
会议地点	Phoenix, AZ, United states
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
卷号	8
DOI	10.1115/IMECE201666379
英文摘要	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.
会议录	ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
会议录出版者	American Society of Mechanical Engineers (ASME)
会议录出版地	THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
语种	英语
资助项目	Gansu Science Foundation of China[2016GS09062]
WOS研究方向	Engineering
WOS记录号	WOS:000400877900006
内容类型	会议论文
源URL	[http://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, Jiangsu Key Lab Design & Mfg Micronano Biomed Ins, Nanjing, Jiangsu, Peoples R China 2.Lanzhou Univ Technol, Sch Mech & Elect Engn, Lanzhou, Gansu, Peoples R China 3.Southeast Univ, Sch Mech Engn, Nanjing, Jiangsu, 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]. 见:. Phoenix, AZ, United states. November 11, 2016 - November 17, 2016.