Electronic structure of colossal permittivity (Mg1/3Nb2/3)0.05Ti0.95O2 ceramics
文献类型：期刊论文
| 作者 | Thongyong, Nateeporn1; Srepusharawoot, Pornjuk1,2; Tuichai, Wattana1; Chanlek, Narong3; Amornkitbamrung, Vittaya1; Thongbai, Prasit1 |
| 刊名 | Ceramics International
 |
| 出版日期 | 2018 |
| ISSN号 | 02728842 |
| DOI | 10.1016/j.ceramint.2018.08.129 |
| 英文摘要 | A systematic investigation on the dielectric and electronic structure of Mg2+/Nb5+ co−doped rutile−TiO2 ceramics was performed. The (Mg1/3Nb2/3)0.05Ti0.95O2 ceramic was prepared by a solid state reaction method and sintered at 1350 °C for 2 h. Pure rutile−TiO2 phase was detected in the sintered ceramic with highly dense microstructure. By optimizing co−doping concentration, interestingly, the (Mg1/3Nb2/3)0.05Ti0.95O2 ceramic exhibited low loss tangent (3 Hz) and high dielectric permittivity of ≈ 104 with slightly dependent on temperature over a wide range. To understand the cause of high−performance dielectric properties in the (Mg1/3Nb2/3)0.05Ti0.95O2 ceramic, the ground state structure of this material was investigated by the density functional theory. Calculation results revealed that Mg atom is located near the oxygen vacancy. Moreover, our results revealed that the Nb atoms in the (Mg1/3Nb2/3)0.05Ti0.95O2 unlikely form the diamond shape. Hence, it cannot generate large defect−dipole moments. Thus, the colossal permittivity in the (Mg1/3Nb2/3)0.05Ti0.95O2 ceramic should be attributed to the extrinsic effects. © 2018 Elsevier Ltd and Techna Group S.r.l. |
| 出版者 | Elsevier Ltd |
| 源URL | [http://ir.sic.ac.cn/handle/331005/25276]  |
| 专题 | 中国科学院上海硅酸盐研究所 |
| 作者单位 | 1.Integrated Nanotechnology Research Center (INRC), Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen; 40002, Thailand; 2.Thailand Center of Excellence in Physics, Commission on Higher Education, 328 Si Ayutthaya Road, Bangkok; 10400, Thailand; 3.Synchrotron Light Research Institute (Public Organization), 111 University Avenue, Muang District, Nakhon Ratchasima; 30000, Thailand |
| 推荐引用方式 GB/T 7714 | Thongyong, Nateeporn,Srepusharawoot, Pornjuk,Tuichai, Wattana,et al. Electronic structure of colossal permittivity (Mg1/3Nb2/3)0.05Ti0.95O2 ceramics[J]. Ceramics International,2018. |
| APA | Thongyong, Nateeporn,Srepusharawoot, Pornjuk,Tuichai, Wattana,Chanlek, Narong,Amornkitbamrung, Vittaya,&Thongbai, Prasit.(2018).Electronic structure of colossal permittivity (Mg1/3Nb2/3)0.05Ti0.95O2 ceramics.Ceramics International. |
| MLA | Thongyong, Nateeporn,et al."Electronic structure of colossal permittivity (Mg1/3Nb2/3)0.05Ti0.95O2 ceramics".Ceramics International (2018). |
入库方式： OAI收割
来源：上海硅酸盐研究所
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