Colossal Permittivity and Dielectric Relaxations of (Nb, Al) Co-doped BaTiO3 Ceramics
文献类型：期刊论文
| 作者 | Huang Dong1,2; Wu Ying1; Miao Ji-Yuan1; Liu Zhi-Fu1; Li Yong-Xiang1 |
| 刊名 | JOURNAL OF INORGANIC MATERIALS
 |
| 出版日期 | 2017-02-01 |
| 卷号 | 32期号:2页码:219-224 |
| 关键词 | (Nb, Al) co-doped perovskites colossal permittivity electron-pinned defect-dipoles |
| 英文摘要 | Nb and Al co-doped BaTiO3 ceramics, BaTi0.98(Nb0.5Al0 5)(0.02)O-3, have a colossal permittivity (epsilon(r)approximate to 3 X 10(5), tan delta approximate to 0.2) at room-temperature. Three distinct relaxation processes are observed in the frequency range from 10(-1) to 10(7) Hz. The low-frequency relaxation between 10.1 and 10 Hz and the intermediate-frequency relaxation between 10(3) and 10(5) Hz are non-Debye relaxations, which are attributed to Maxwell-Wagner interfacial polarization, electrode interfacial polarization, and barrier layer capacitor. While the high-frequency process between 10(5) and 10(7) Hz is a typical Debye-type relaxation with an activation energy of E approximate to 15 meV and a frequency factor of f(0)approximate to 7 X 10(6) Hz. The small activation energy and relatively small frequency factor in the BaTi0.98(Nb0.5Al0.5)(0.02)O-3 ceramics indicate that this relaxation process may derive from local motion of electrons in the complex defect clusters, which results from co-doping and can be named as electron-pinned defect-dipoles. This study suggests that the electron-pinned defect-dipoles mechanism can be used to design colossal permittivity in perovskites, like BaTiO3. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Materials Science, Ceramics |
| 研究领域[WOS] | Materials Science |
| 关键词[WOS] | THIN-FILMS ; PERFORMANCE ; PEROVSKITES |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000394920800018 |
| 源URL | [http://ir.sic.ac.cn/handle/331005/23683]  |
| 专题 | 上海硅酸盐研究所_无机功能材料与器件重点实验室_期刊论文 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Inst Ceram, CAS Key Lab Inorgan Funct Mat & Devices, Shanghai 200050, Peoples R China 2.Shanghai Tech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China |
| 推荐引用方式 GB/T 7714 | Huang Dong,Wu Ying,Miao Ji-Yuan,et al. Colossal Permittivity and Dielectric Relaxations of (Nb, Al) Co-doped BaTiO3 Ceramics[J]. JOURNAL OF INORGANIC MATERIALS,2017,32(2):219-224. |
| APA | Huang Dong,Wu Ying,Miao Ji-Yuan,Liu Zhi-Fu,&Li Yong-Xiang.(2017).Colossal Permittivity and Dielectric Relaxations of (Nb, Al) Co-doped BaTiO3 Ceramics.JOURNAL OF INORGANIC MATERIALS,32(2),219-224. |
| MLA | Huang Dong,et al."Colossal Permittivity and Dielectric Relaxations of (Nb, Al) Co-doped BaTiO3 Ceramics".JOURNAL OF INORGANIC MATERIALS 32.2(2017):219-224. |
入库方式： OAI收割
来源：上海硅酸盐研究所
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