| Phase Structures of （K0.48Na0.52）0.945Li0.055Sb0.05Nb0.95O3 Piezoceramics |
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| 引用本文： | 臧国忠,仪修杰,徐志军,付鹏,赵利民,蒲锡鹏.Phase Structures of （K0.48Na0.52）0.945Li0.055Sb0.05Nb0.95O3 Piezoceramics[J].中国物理快报,2010(1):242-244. |
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| 作者姓名： | 臧国忠 仪修杰 徐志军 付鹏 赵利民 蒲锡鹏 |
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| 作者单位： | School of Materials Science and Engineering, Liaocheng University, Liaocheng 252059 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant No 50802038, and the Doctor Foundation of Shandong Province under Grant No 2007BS04047. |
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| 摘 要： | The phase structures of lead-free （K0.48Na0.52）0.945Li0.055Sb0.05Nb0.95O3 piezoceramics are studied based on the measurements of ferroelectric and dielectric properties as well as the analyses of x-ray diffraction pattern and energy dispersive spectroscopy. The poled samples exhibit orthorhombic structure whereas the surface and interior for unpoled samples exhibit tetragonal and tetragonal-orthorhombic coexistent structures, respectively. These results are in agreement with the relative permittivity-temperature curves and demonstrate that phase transitions can be induced by Na volatilization and poling process. The remnant polarization Pr measured at 20°C increases continuously with the increase of electric field in the range of 2000-4000V/mm. This indicates that the polymorphic structure is more beneficial to the rotation or reorientation of dipoles than either the orthorhombic or the tetragonal structure. The randomly oriented domains may be the essential reason for the continuous rotation or reorientation and not good thermal stability.
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| 关 键 词： | 压电陶瓷 相结构 作者 正交结构 相对介电常数 极化过程 极化测量 连续旋转 |
Phase Structures of （K0.48Na0.52）0.945Li0.055Sb0.05Nb0.95O3 Piezoceramics |
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| ZANG Guo-Zhong,YI Xiu-Jie,XU Zhi-Jun,FU Peng,ZHAO Li-Min,PU Xi-Peng.Phase Structures of （K0.48Na0.52）0.945Li0.055Sb0.05Nb0.95O3 Piezoceramics[J].Chinese Physics Letters,2010(1):242-244. |
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| Authors: | ZANG Guo-Zhong YI Xiu-Jie XU Zhi-Jun FU Peng ZHAO Li-Min PU Xi-Peng |
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| Affiliation: | School of Materials Science and Engineering, Liaocheng University, Liaocheng 252059 |
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