| Piezoelectric Properties of （Na0.5K0.5-xLix）NbO3 Ceramics |
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| 作者姓名： | Peng QI Jinfeng WANG Baoquan MING Juan DU Xinghua LIANG Limei ZHENG |
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| 作者单位： | School of Physics, Shandong University, Jinan 250100, China |
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| 摘 要： | Lead-free piezoelectric ceramics （Na0.5K0.5-xLix）NbO3 （x=0.057-0.066） were synthesized by an ordinary sin-tering technique. Substituting Li for K can lead to structural distortion, which improves the Curie temperature （To） greatly. By adding appropriate LiNbO3 content, piezoelectric constant d33 values reach 202-212 pC/N. Electromechanical coefficients of the planar mode reach 44.4%-46.8%. The dielectric loss is below 2.6%, which is much lower than reported （about 50%）. The To of （Na0.5K0.5-xLix）NbO3 （x=0.057-0.066） is in the range of 490-510℃, at least 70℃ higher than that of pure （Na0.5K0.5）NbO3 ceramics. The results show that （Na0.5K0.5-xLix）NbO3 ceramic is a kind of good lead-free high-temperature piezoelectric material.
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| 关 键 词： | 压电材料 电介质 Na0.5K0.5-xLix NbO3陶瓷材料 |
| 收稿时间： | 2006-08-22 |
| 修稿时间： | 2006-08-22 |
Piezoelectric Properties of (Na0.5K0.5-xLix)NbO3 Ceramics |
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| Peng QI Jinfeng WANG Baoquan MING Juan DU Xinghua LIANG Limei ZHENG.Piezoelectric Properties of (Na0.5K0.5-xLix)NbO3 Ceramics[J].Journal of Materials Science & Technology,2007,23(6):833-836. |
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| Authors: | Peng QI Jinfeng WANG Baoquan MING Juan DU Xinghua LIANG Limei ZHENG |
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| Affiliation: | School of Physics, Shandong University, Jinan 250100, China |
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| Abstract: | Lead-free piezoelectric ceramics (Na0.5K0.5-xLix)NbO3 (x=0.057-0.066) were synthesized by an ordinary sintering technique. Substituting Li for K can lead to structural distortion, which improves the Curie temperature(TC) greatly. By adding appropriate LiNbO3 content, piezoelectric constant d33 values reach 202-212 pC/N.Electromechanical coefficients of the planar mode reach 44.4%-46.8%. The dielectric loss is below 2.6%,which is much lower than reported (about 50%). The TC of (Na0.5K0.5-xLix)NbO3 (x=0.057-0.066) is in the range of 490-510℃, at least 70℃ higher than that of pure (Na0.5K0.5)NbO3 ceramics. The results show that (Na0.5K0.5-xLix)NbO3 ceramic is a kind of good lead-free high-temperature piezoelectric material. |
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| Keywords: | Lead-free Piezoelectric Dielectric Morphotropic phase boundary |
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