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Low thermal conductivity of Lu4Si2O7N2: Theoretical and experimental studies
Sun, Luchao1; Tian, Zhilin1,2; Wang, Jingyang1
Corresponding AuthorWang, Jingyang(jywang@imr.ac.cn)
2015-10-01
Source PublicationJOURNAL OF THE EUROPEAN CERAMIC SOCIETY
ISSN0955-2219
Volume35Issue:12Pages:3237-3247
AbstractThermal 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.
KeywordLutetium silicon oxynitride Low thermal conductivity First-principles calculation Experimental investigation
Funding OrganizationNatural Sciences Foundation of China
DOI10.1016/j.jeurceramsoc.2015.02.030
Indexed BySCI
Language英语
Funding ProjectNatural Sciences Foundation of China[51032006] ; Natural Sciences Foundation of China[51372252] ; Natural Sciences Foundation of China[51402313]
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Ceramics
WOS IDWOS:000357356000006
PublisherELSEVIER SCI LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80946
Corresponding AuthorWang, Jingyang
Affiliation1.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
Recommended Citation
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.
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