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High-entropy titanate pyrochlore as newly low-thermal conductivity ceramics

文献类型：期刊论文

作者Guo, Yongchang1,2,3; Feng, Shaowei1,2,3; Yang, Yafeng1,3; Zheng, Run1,3; Zhang, Ying1,3; Fu, Jie1,3; Wang, Hui1,3,4; Li, Jianqiang1,2,3,4
刊名JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
出版日期2022-11-01
卷号42期号:14页码:6614-6623
ISSN号0955-2219
关键词High -entropy ceramics Titanate pyrochlore Melt solidification Low -thermal conductivity materials Thermal expansion coefficient
DOI10.1016/j.jeurceramsoc.2022.07.006
英文摘要Low-thermal conductivity ceramics play an indispensable role in maximizing the efficiency and durability of hot end components. Pyrochlore, particularly zirconate pyrochlore, is currently a highly promising and widely studied candidate for its extremely low thermal conductivity. However, there are still few pyrochlores that offer both stiffness, insulation, and good thermal expansion properties. In this work, the solidification method was innovatively introduced into the preparation of titanate pyrochlore, and combined it with the compositional design of high-entropy. Through careful composition design and solidification control, the high-density and uniform elements distributed high-entropy titanate pyrochlore ceramics were successfully prepared. These samples possess high hardness (15.88 GPa) and Young's modulus (295.5 GPa), low thermal conductivity (0.947 W center dot m- 1 center dot K-1), excellent thermal expansion coefficient (11.6 x10-6/K) and an exquisite balance between stiffness and insulation (E/kappa, 312.1 GPa center dot W-1 center dot m center dot K), in which the E/kappa exhibits the highest value among the current reported works.
WOS关键词MECHANICAL-PROPERTIES ; BARRIER MATERIAL ; YB ; ER ; RE ; COATINGS ; OXIDE ; ND ; HO ; DY
资助项目National Natural Science Foundation of China[51972304] ; National Natural Science Foundation of China[51971208] ; Beijing Municipal Science and Technology Project[Z191100004819002] ; Project of Scientific Experiment on Chinese Manned Space Station ; Fundamental Research Funds for the Central Universities
WOS研究方向Materials Science
语种英语
出版者ELSEVIER SCI LTD
WOS记录号WOS:000843979500004
资助机构National Natural Science Foundation of China ; Beijing Municipal Science and Technology Project ; Project of Scientific Experiment on Chinese Manned Space Station ; Fundamental Research Funds for the Central Universities
源URL[http://ir.ipe.ac.cn/handle/122111/54471]  
专题中国科学院过程工程研究所
通讯作者Li, Jianqiang
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
3.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
4.Chinese Acad Sci, Innovat Acad Green Manufacture, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714		 Guo, Yongchang,Feng, Shaowei,Yang, Yafeng,et al. High-entropy titanate pyrochlore as newly low-thermal conductivity ceramics[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,2022,42(14):6614-6623.
APA Guo, Yongchang.,Feng, Shaowei.,Yang, Yafeng.,Zheng, Run.,Zhang, Ying.,...&Li, Jianqiang.(2022).High-entropy titanate pyrochlore as newly low-thermal conductivity ceramics.JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,42(14),6614-6623.
MLA Guo, Yongchang,et al."High-entropy titanate pyrochlore as newly low-thermal conductivity ceramics".JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 42.14(2022):6614-6623.

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来源：过程工程研究所

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