Knowledge Management System of Hefei Institute of Physical Science，CAS
| Crossover of thermal expansion from positive to negative by removing the excess fluorines in cubic ReO3-type TiZrF7-x | |
Yang, Cheng1,2; Zhang, Yugang3; Bai, Jianming3; Qu, Bingyan4; Tong, Peng1,2 ; Wang, Meng1; Lin, Jianchao1; Zhang, Ranran5; Tong, Haiyun1,2; Wu, Ying1; Song, Wenhai1; Sun, Yuping1,5
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| 2018-05-21 | |
| 发表期刊 | JOURNAL OF MATERIALS CHEMISTRY C
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| ISSN | 2050-7526 |
| 摘要 | We report the crossover of the coefficient of thermal expansion (CTE) from positive to negative by withdrawing the excess fluorines in ReO3-type TiZrF7-x (x = 0, 0.5 and 1) compounds. The average volumetric CTE between 300 K and 623 K changes from 8.07 ppm K-1 for x = 0, to 0.66 ppm K-1 for x = 0.5 and finally to -6.09 ppm K-1 for x = 1. After withdrawing the excess fluorines, the lattice expands and the edge-sharing polyhedra partially transform to corner-sharing ones, which enhances the transverse vibrations of fluorines and thus accounts for the crossover of CTE. Moreover, these compounds are narrow-gap semiconductors with the energy gap decreasing with x. NTE may also be achievable in other fluorine-excess cubic fluorides by removing the excess fluorines, which opens up a new avenue for exploring the NTE in fluorides. |
| DOI | 10.1039/c7tc04875k |
| 关键词[WOS] | PHASE-TRANSITIONS ; CRYSTAL-CHEMISTRY ; SILICON ; ZERO ; SCF3 ; FERROMAGNETISM ; DEPENDENCE ; BEHAVIOR ; FE ; LN |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences[DE-SC0012704] ; National Natural Science Foundation of China (NSFC)[U1632158] ; National Natural Science Foundation of China (NSFC)[51322105] ; Key Research Program of Frontier Sciences, CAS[QYZDB-SSW-SLH015] ; Key Research Program of Frontier Sciences, CAS[QYZDB-SSW-SLH015] ; National Natural Science Foundation of China (NSFC)[51322105] ; National Natural Science Foundation of China (NSFC)[U1632158] ; U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences[DE-SC0012704] |
| WOS研究方向 | Materials Science ; Physics |
| WOS类目 | Materials Science, Multidisciplinary ; Physics, Applied |
| WOS记录号 | WOS:000432599600007 |
| 出版者 | ROYAL SOC CHEMISTRY |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.hfcas.ac.cn:8080/handle/334002/36405 |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Tong, Peng; Sun, Yuping |
| 作者单位 | 1.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China 3.Brookhaven Natl Lab, Natl Synchrotron Light Source 2, Upton, NY 11973 USA 4.Hefei Univ Technol, Sch Mat Sci & Engn, Lab Amorphous Mat, Hefei 230009, Anhui, Peoples R China 5.Chinese Acad Sci, High Field Magnet Lab, Hefei 230031, Peoples R China |
| 通讯作者单位 | 中科院强磁场科学中心 |
| 推荐引用方式 GB/T 7714 | Yang, Cheng,Zhang, Yugang,Bai, Jianming,et al. Crossover of thermal expansion from positive to negative by removing the excess fluorines in cubic ReO3-type TiZrF7-x[J]. JOURNAL OF MATERIALS CHEMISTRY C,2018,6(19):5148-5152. |
| APA | Yang, Cheng.,Zhang, Yugang.,Bai, Jianming.,Qu, Bingyan.,Tong, Peng.,...&Sun, Yuping.(2018).Crossover of thermal expansion from positive to negative by removing the excess fluorines in cubic ReO3-type TiZrF7-x.JOURNAL OF MATERIALS CHEMISTRY C,6(19),5148-5152. |
| MLA | Yang, Cheng,et al."Crossover of thermal expansion from positive to negative by removing the excess fluorines in cubic ReO3-type TiZrF7-x".JOURNAL OF MATERIALS CHEMISTRY C 6.19(2018):5148-5152. |
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