中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Highly porous nano-SiC with very low thermal conductivity and excellent high temperature behavior

文献类型:期刊论文

作者Wan, P; Wang, JY; Wang, JY (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, High Performance Ceram Div, Shenyang 110016, Liaoning, Peoples R China.
刊名JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
出版日期2018-02-01
卷号38期号:2页码:463-467
ISSN号0955-2219
关键词Silicon-carbide Ceramics Fabrication Microstructure Densification Scattering Strength Powders
英文摘要Highly porous nano-SiC is fabricated by partial sintering and decarburizing process using SiC nano-powders as starting materials and graphite flakes as pore forming agents. The prepared porous nano-SiC ceramics possess multiple pore structures, including well-distributed meso-pores in the skeleton and interconnected flakelike micro-pores. The samples prepared at 1800 degrees C have relatively low thermal conductivities of 5.61 similar to 0.25 W m(-1) K-1 with porosities of 55.5-76.1%. While the samples sintered at 1500 degrees C with porosities between 54.0% to 76.3% show very low thermal conductivities of 0.74 similar to 0.14 W m(-1) K-1, which is attributed to the integrated nano-scale phonon-scattering mechanisms and duplex pore structures. Porous nano-SiC ceramics also show good retention of elastic stiffness up to 1350 degrees C and low thermal conductivity at 1400 degrees C. Our results shed light on porous nano-SiC as a promising thermal insulator used in extreme thermal and chemical environments.; Highly porous nano-SiC is fabricated by partial sintering and decarburizing process using SiC nano-powders as starting materials and graphite flakes as pore forming agents. The prepared porous nano-SiC ceramics possess multiple pore structures, including well-distributed meso-pores in the skeleton and interconnected flakelike micro-pores. The samples prepared at 1800 degrees C have relatively low thermal conductivities of 5.61 similar to 0.25 W m(-1) K-1 with porosities of 55.5-76.1%. While the samples sintered at 1500 degrees C with porosities between 54.0% to 76.3% show very low thermal conductivities of 0.74 similar to 0.14 W m(-1) K-1, which is attributed to the integrated nano-scale phonon-scattering mechanisms and duplex pore structures. Porous nano-SiC ceramics also show good retention of elastic stiffness up to 1350 degrees C and low thermal conductivity at 1400 degrees C. Our results shed light on porous nano-SiC as a promising thermal insulator used in extreme thermal and chemical environments.
学科主题Materials Science, Ceramics
语种英语
资助机构National Key R & D Program of China [2017YFB0703201]; Natural Science Foundation of China [5137225, 51772302]
公开日期2018-06-05
源URL[http://ir.imr.ac.cn/handle/321006/79557]  
专题金属研究所_中国科学院金属研究所
通讯作者Wang, JY (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, High Performance Ceram Div, Shenyang 110016, Liaoning, Peoples R China.
推荐引用方式
GB/T 7714
Wan, P,Wang, JY,Wang, JY . Highly porous nano-SiC with very low thermal conductivity and excellent high temperature behavior[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,2018,38(2):463-467.
APA Wan, P,Wang, JY,&Wang, JY .(2018).Highly porous nano-SiC with very low thermal conductivity and excellent high temperature behavior.JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,38(2),463-467.
MLA Wan, P,et al."Highly porous nano-SiC with very low thermal conductivity and excellent high temperature behavior".JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 38.2(2018):463-467.

入库方式: OAI收割

来源:金属研究所

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