| Properties of Co-Doped 0.92（Na0.5Bi0.5） TiO3-0.08BaTiO3 Lead-Free Ceramics |
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| 引用本文： | 江向平,郑严艳,江福兰,刘利华,郭建荣,陈王丽华.Properties of Co-Doped 0.92（Na0.5Bi0.5） TiO3-0.08BaTiO3 Lead-Free Ceramics[J].中国物理快报,2007,24(11):3257-3259. |
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| 作者姓名： | 江向平 郑严艳 江福兰 刘利华 郭建荣 陈王丽华 |
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| 作者单位： | [1]Department of Material Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333001 [2]Department of Applied Physics and Materials Research Center, The Hong Kong Polytechnic University, Hong Kong |
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| 基金项目： | Supported by the National Natural Science Foundation of China under No 50562002, the New Century Excellent Talents in University （NCET-06-0576）, the Key Industrial Project of Jiangxi Provincial Department of Science and Technology [2005]52, Jiangxi Provincial Department of Education [2005]217, the Natural Science Foundation of Jiangxi Province （No 0650074）, and the Center for Smart Materials of The Hong Kong Polytechnic University. |
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| 摘 要： | Lead-free piezoelectric ceramics 0.92（Bi0.5Na0.5）TiO3-0.08BaTiO3 ＋ xmol% Co3＋ （BNBT-Co, x = 0-8） are prepared by the solid state reaction method. Effects of the amount of Co^3＋ on the electrical properties and phase transition are studied. The results indicate that the addition of Co^3＋ enhances the mechanical quality factor Q^3＋ significantly, whereas the dissipation factor tanδ has a minimum value at x = 3.5. Meanwhile, addition of Co^3＋ leads to small decreases of piezoelectric constant d33, and planar electromechanical coupling kp. The present 0.92（Bio.aNao.5） TiO3-0.08BaTiO3＋3.5 moi% Co^3＋ ceramics exhibit good performance with mechanical quality factor Qm = 910, piezoelectric constant d33 = 106pC/N, planar electromechanical coupling kp =10% and dissipation factor tanδ = 1.1% at 1 kHz. Saturated polarization hysteresis loops have been obtained for BNBT-Co ceramics. Two dielectric peaks at depolarization temperature Td and Tm appear in the curves of ε33^T vs temperature for the pure BNBT ceramics. However, the first dielectric peak Td disappears after the addition of Co^3＋, which means that the transition from ferroelectric to antiferroelectric phase has been eliminated.
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| 关 键 词： | 陶瓷材料 复合材料 化学物理 物理分析 |
| 收稿时间： | 2007-06-17 |
Properties of Co-Doped 0.92(Na0.5Bi0.5) TiO3-0.08BaTiO3 Lead-Free Ceramics |
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| JIANG Xiang-Ping,ZHENG Yan-Yan,JIANG Fu-Lan,LIU Li-Hua,KWOK Kin-Wing,CHAN-WONG Lai-Wa.Properties of Co-Doped 0.92(Na0.5Bi0.5) TiO3-0.08BaTiO3 Lead-Free Ceramics[J].Chinese Physics Letters,2007,24(11):3257-3259. |
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| Authors: | JIANG Xiang-Ping ZHENG Yan-Yan JIANG Fu-Lan LIU Li-Hua KWOK Kin-Wing CHAN-WONG Lai-Wa |
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| Affiliation: | Department of Material Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333001Department of Applied Physics and Materials Research Center, The Hong Kong Polytechnic University, Hong Kong |
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| Abstract: | |
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| Keywords: | 77 84 Dy 77 80 Bh 77 65 Bn |
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