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Approaching ultra-low thermal conductivity in beta-SiC nanoparticle packed beds through multiple heat blocking mechanisms
Wan, Peng; Gao, Liyin; Wang, Jingyang; Wang, JY (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China.
2017-02-01
发表期刊SCRIPTA MATERIALIA
ISSN1359-6462
卷号128页码:1-5
摘要The crucial challenge for oxide thermal insulators, such as Al2O3 and SiO2 nano-particle aggregates, is to solve the trade-off between extremely low thermal conductivity and unsatisfied sintering stability. We herein report the ultra-low thermal conductivities (0.068-0.1 W m(-1) K-1) of beta-SiC nanoparticle (similar to 35 nm) packed beds. The breakthrough is realized by multiple heat blocking mechanisms in the nanostructures. The samples also possess good thermal stability as high as 1500 degrees C. Our results provide a new strategy to explore ultra-low thermal conductivity materials with excellent thermal stability, regardless of their high intrinsic lattice thermal conductivities. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.; The crucial challenge for oxide thermal insulators, such as Al2O3 and SiO2 nano-particle aggregates, is to solve the trade-off between extremely low thermal conductivity and unsatisfied sintering stability. We herein report the ultra-low thermal conductivities (0.068-0.1 W m(-1) K-1) of beta-SiC nanoparticle (similar to 35 nm) packed beds. The breakthrough is realized by multiple heat blocking mechanisms in the nanostructures. The samples also possess good thermal stability as high as 1500 degrees C. Our results provide a new strategy to explore ultra-low thermal conductivity materials with excellent thermal stability, regardless of their high intrinsic lattice thermal conductivities. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
部门归属[wan, peng ; gao, liyin ; wang, jingyang] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china ; [wan, peng ; gao, liyin] univ chinese acad sci, beijing 100049, peoples r china
关键词Nanostructured Sic Low Thermal Conductivity High Thermal Stability
学科领域Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助者Natural Science Foundation of China [51032006, 5137225]
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/78327
专题中国科学院金属研究所
通讯作者Wang, JY (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China.
推荐引用方式
GB/T 7714
Wan, Peng,Gao, Liyin,Wang, Jingyang,et al. Approaching ultra-low thermal conductivity in beta-SiC nanoparticle packed beds through multiple heat blocking mechanisms[J]. SCRIPTA MATERIALIA,2017,128:1-5.
APA Wan, Peng,Gao, Liyin,Wang, Jingyang,&Wang, JY .(2017).Approaching ultra-low thermal conductivity in beta-SiC nanoparticle packed beds through multiple heat blocking mechanisms.SCRIPTA MATERIALIA,128,1-5.
MLA Wan, Peng,et al."Approaching ultra-low thermal conductivity in beta-SiC nanoparticle packed beds through multiple heat blocking mechanisms".SCRIPTA MATERIALIA 128(2017):1-5.
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