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| High-entropy titanate pyrochlore as newly low-thermal conductivity ceramics | |
| Guo, Yongchang1,2,3; Feng, Shaowei1,2,3; Yang, Yafeng2,3; Zheng, Run2,3; Zhang, Ying2,3; Fu, Jie2,3; Wang, Hui2,3,4; Li, Jianqiang1,2,3,4 | |
| 2022-11-01 | |
| Source Publication | JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
 |
| ISSN | 0955-2219 |
| Volume | 42Issue:14Pages:6614-6623 |
| Abstract | 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. |
| Keyword | High -entropy ceramics Titanate pyrochlore Melt solidification Low -thermal conductivity materials Thermal expansion coefficient |
| DOI | 10.1016/j.jeurceramsoc.2022.07.006 |
| Language | 英语 |
| WOS Keyword | MECHANICAL-PROPERTIES ; BARRIER MATERIAL ; YB ; ER ; RE ; COATINGS ; OXIDE ; ND ; HO ; DY |
| Funding Project | 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 Research Area | Materials Science |
| WOS Subject | Materials Science, Ceramics |
| Funding Organization | 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 |
| WOS ID | WOS:000843979500004 |
| Publisher | ELSEVIER SCI LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/54472 |
| Collection | 中国科学院过程工程研究所 |
| Corresponding Author | Li, Jianqiang |
| Affiliation | 1.Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Innovat Acad Green Manufacture, Beijing 100190, Peoples R China |
| Recommended Citation 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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