Low thermal conductivity of Lu4Si2O7N2: Theoretical and experimental studies

doi:10.1016/j.jeurceramsoc.2015.02.030

IMR OpenIR

	Low thermal conductivity of Lu4Si2O7N2: Theoretical and experimental studies
	Sun, Luchao 1; Tian, Zhilin 1,2; Wang, Jingyang 1
通讯作者	Wang, Jingyang(jywang@imr.ac.cn)
	2015-10-01
发表期刊	JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
ISSN	0955-2219
卷号	35 期号:12 页码:3237-3247
摘要	Thermal conductivity of bulk and dense oxynitride Lu4Si2O7N2 was measured at various temperatures. Results show that Lu4Si2O7N2 possesses low thermal conductivity and has potential applications as thermal insulation material. Detailed analysis shows that the experimental thermal diffusivity is significantly influenced by defects at low temperature and infrared radiation at high temperature. Therefore, we combined Debye model and Slack's equation to predict the temperature dependent intrinsic lattice thermal conductivity of Lu4Si2O7N2. All parameters indispensable in the calculation (equilibrium crystal structure, second order elastic constants, elastic modulus, Debye temperature, and Gruneisen constant) were predicted with the help of first-principles calculation methods. Finally, factors that influence the thermal conductivity of Lu4Si2O7N2 were discussed and possible explanations for the difference between experimental and theoretical thermal conductivity were illustrated. (C) 2015 Elsevier Ltd. All rights reserved.
关键词	Lutetium silicon oxynitride Low thermal conductivity First-principles calculation Experimental investigation
资助者	Natural Sciences Foundation of China
DOI	10.1016/j.jeurceramsoc.2015.02.030
收录类别	SCI
语种	英语
资助项目	Natural Sciences Foundation of China[51032006] ; Natural Sciences Foundation of China[51372252] ; Natural Sciences Foundation of China[51402313]
WOS研究方向	Materials Science
WOS类目	Materials Science, Ceramics
WOS记录号	WOS:000357356000006
出版者	ELSEVIER SCI LTD
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/80946
通讯作者	Wang, Jingyang
作者单位	1.Chinese Acad Sci, Inst Met Res, High Performance Ceram Div, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Sun, Luchao,Tian, Zhilin,Wang, Jingyang. Low thermal conductivity of Lu4Si2O7N2: Theoretical and experimental studies[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,2015,35(12):3237-3247.
APA	Sun, Luchao,Tian, Zhilin,&Wang, Jingyang.(2015).Low thermal conductivity of Lu4Si2O7N2: Theoretical and experimental studies.JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,35(12),3237-3247.
MLA	Sun, Luchao,et al."Low thermal conductivity of Lu4Si2O7N2: Theoretical and experimental studies".JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 35.12(2015):3237-3247.