| Dielectric and piezoelectric properties of （Li, Ce） modified NaBi5Ti5O18 composite ceramics |
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| 引用本文： | 马磊,赵琨,李吉夏,吴琪,赵明磊,王春雷.Dielectric and piezoelectric properties of （Li, Ce） modified NaBi5Ti5O18 composite ceramics[J].中国稀土学报(英文版),2009,27(3):496-500. |
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| 作者姓名： | 马磊 赵琨 李吉夏 吴琪 赵明磊 王春雷 |
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| 作者单位： | School of Physics, Shandong University, Jinan 250100, China
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| 基金项目： | Foundation item： Project supported by the National Natural Science Foundation of China （50702030） and National Fund for Fostering Talents of Basic Science （J0730318） |
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| 摘 要： |
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| 关 键 词： | 复合陶瓷材料 压电性能 改性 X射线衍射技术 低温度系数 介质 机电耦合系数 固相反应 |
| 收稿时间： | 12 August 2008 |
Dielectric and piezoelectric properties of (Li, Ce) modified NaBi5Ti5O18composite ceramics |
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| MA Lei,ZHAO Kun,LI Jixia,WU Qi,ZHAO Minglei,WANG Chunlei.Dielectric and piezoelectric properties of (Li, Ce) modified NaBi5Ti5O18composite ceramics[J].Journal of Rare Earths,2009,27(3):496-500. |
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| Authors: | MA Lei ZHAO Kun LI Jixia WU Qi ZHAO Minglei WANG Chunlei |
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| Affiliation: | School of Physics, Shandong University, Jinan 250100, China |
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| Abstract: | Nominal (Li0.5Ce0.5)x(Na0.5Bi0.5)(1-x)Na0.5Bi4.5Ti5O18 composite ceramics were fabricated using conventional solid-state reaction method. The coexistence of bismuth layer-structured phase and perovskite phase was determined in these ceramics using XRD technique. At room temperature, the x=0.11 sample showed the largest piezoelectric constant, d33, of about 26.5 pC/N and the largest electromechanical coupling factor, kt, of about 30%. Even after annealing at 500 ℃, the value of d33 was still about 19 pC/N, in x=0.08-0.11 samples. Moreover, these composite ceramics showed low temperature coefficients of dielectric constant and high electrical resistivity in the temperature region of 450-550 ℃. These results indicated that (Li, Ce) modified NaBi5Ti5O18 composite ceramics were promising piezoelectric materials for high-temperature applications. |
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| Keywords: | ferroelectrics composite ceramics dielectric properties piezoelectric properties electrical resistivity rare earths |
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