| Microstructure, crystalline phase and electrical properties of Li0.06（Na0.5K0.5）0.94Nb（1-2x/5）MgxO3 lead-free piezoelectric ceramics |
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| 作者姓名： | Hai-tao Li Bo-ping Zhang Qian Zhang Peng-peng Shang Gao-lei Zhao |
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| 作者单位： | Hai-tao Li(School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China ;School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471003, China);Bo-ping Zhang,Qian Zhang,Peng-peng Shang,Gao-lei Zhao(School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China) |
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| 基金项目： | the Research Fund for the Doctoral Program of Higher Education of China，the National Basic Research Priorities Program of China，the Program of University-Industry Cooperation Sup-ported by the Ministry of Education and Guangdong Province of China |
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| 摘 要： | MgO-modified Li0.06(Na0.5K0.5)0.94NbO3(L6NKN) lead-free piezoelectric ceramics were synthesized by normal sintering at a relatively low temperature of 1000°C.The crystalline phase,microstructure,and electrical properties of the ceramics were investigated with a special emphasis on the influence of MgO content.The addition of MgO effectively improves the sinterability of the L6NKN ceramics.X-ray diffraction analysis indicates that the morphotropic phase boundary(MPB) separating orthorhombic and tetragonal ph...
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| 关 键 词： | 无铅压电陶瓷 微观结构 电性能 结晶相 MgO含量 机电耦合系数 相对介电常数 无铅压电材料 |
Microstructure, crystalline phase and electrical properties of Li0.06(Na0.5K0.5)0.94Nb(1-2x/5)MgxO3 lead-free piezoelectric ceramics |
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| Hai-tao Li,Bo-ping Zhang,Qian Zhang,Peng-peng Shang,Gao-lei Zhao.Microstructure, crystalline phase and electrical properties of Li0.06(Na0.5K0.5)0.94Nb(1-2x/5)MgxO3 lead-free piezoelectric ceramics[J].Journal of University of Science and Technology Beijing,2010,17(3):340-346. |
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| Authors: | Hai-tao Li Bo-ping Zhang Qian Zhang Peng-peng Shang Gao-lei Zhao |
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| Affiliation: | Hai-tao Li1,2),Bo-ping Zhang1),Qian Zhang1),Peng-peng Shang1),and Gao-lei Zhao1) 1) School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China 2) School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471003,China |
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| Abstract: | MgO-modified Li0.06(Na0.5K0.5)0.94NbO3 (L6NKN) lead-free piezoelectric ceramics were synthesized by normal sintering at a rela-tively low temperature of 1000℃. The crystalline phase, microstructure, and electrical properties of the ceramics were investigated with a special emphasis on the influence of MgO content. The addition of MgO effectively improves the sinterability of the L6NKN ceramics. X-ray diffraction analysis indicates that the morphotropic phase boundary (MPB) separating orthorhombic and tetragonal phases for the ceramics lies in the range of Mg doping content (x) from 0.3at% to 0.7at%. High electrical properties of the piezoelectric constant (d33=238 pC/N), planar electromechanical coupling coefficient (Kp=41.5%), relative dielectric constant (εr=905), and remanent polarization (Pr=38.3μC/cm2) are obtained from the specimen with x=0.5at%, which suggests mat the Li0.06(Na0.5K0.5)0.94Nb(1-2x/5)MgxO3 (x=0.5at%) ceramic is a promising lead-free piezoelectric material. |
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| Keywords: | lead-free piezoelectric ceramics sinterability sintering morphotropic phase boundary |
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