| Structure and microwave dielectric properties of hexagonal Ba[Ti1-x(Ni1/2W1/2)(x)]O-3 ceramics | |
| Zhao, Fei ; Yue, Zhenxing ; Pei, Jing ; Zhuang, Hao ; Gui, Zhilun ; Li, Longtu | |
| 2010-05-10 ; 2010-05-10 | |
| 关键词 | BARIUM-TITANATE CERAMICS ELECTRICAL-PROPERTIES COMPLEX PERMITTIVITY CRYSTAL-STRUCTURE BATIO3 TEMPERATURE RESONATORS PEROVSKITE FILTERS Materials Science, Ceramics |
| 中文摘要 | Microwave dielectric ceramics with the composition of Ba[Ti1-x(Ni1/2W1/2)(x)]O-3 (x = 0.4-0.6) were prepared by a solid-state reaction method. The evolution of the crystalline phases was investigated by X-ray powder diffraction analysis. A cubic-to-hexagonal phase transition occurred between 1000 degrees and 1300 degrees C. The phase transition is irreversible; thus, the hexagonal phase remains stable at room temperature. The X-ray powder diffraction data for x = 0.5 were refined using the Rietveld method. It was identified as a h-BaTiO3-type hexagonal perovksite with the space group of P6(3)/mmc. It also reveals that random occupancy of Ti4+ and W6+ ions occurs in the B-site substructures, whereas Ni2+ ions exclusively occupy the octahedral site in the corner-sharing octahedron. The dielectric properties of dense-sintered ceramics were characterized at microwave frequencies. With an increase in x from 0.4 to 0.6, the Q x f value increased from 26 700 to 42 000 GHz, whereas epsilon(f), decreased from 29.8 to 20.0, and tau(f) from +6.5 to -9.9 ppm/degrees C. |
| 语种 | 英语 ; 英语 |
| 出版者 | BLACKWELL PUBLISHING ; OXFORD ; 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/21059]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | Zhao, Fei,Yue, Zhenxing,Pei, Jing,et al. Structure and microwave dielectric properties of hexagonal Ba[Ti1-x(Ni1/2W1/2)(x)]O-3 ceramics[J],2010, 2010. |
| APA | Zhao, Fei,Yue, Zhenxing,Pei, Jing,Zhuang, Hao,Gui, Zhilun,&Li, Longtu.(2010).Structure and microwave dielectric properties of hexagonal Ba[Ti1-x(Ni1/2W1/2)(x)]O-3 ceramics.. |
| MLA | Zhao, Fei,et al."Structure and microwave dielectric properties of hexagonal Ba[Ti1-x(Ni1/2W1/2)(x)]O-3 ceramics".(2010). |
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