| MnO2掺杂的KNN基无铅压电陶瓷的制备及性能 |
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| 引用本文： | 翁宝振,杜鹃,廖开举,黄振风,王坦,王春明.MnO2掺杂的KNN基无铅压电陶瓷的制备及性能[J].聊城大学学报(自然科学版),2012(1):61-65. |
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| 作者姓名： | 翁宝振 杜鹃 廖开举 黄振风 王坦 王春明 |
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| 作者单位： | 聊城大学材料科学与工程学院;山东大学物理学院晶体材料国家重点实验室 |
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| 基金项目： | 国家自然科学基金资助项目(50902087);山东省自然科学基金资助项目(ZR2009FQ009);聊城大学大学生创新基金资助项目(SRT11020CL2) |
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| 摘 要： | 采用传统的固相反应法制备了(1-x)(Na0.65K0.35)0.94Li0.06NbO3-xmol%MnO2无铅压电陶瓷,研究了Mn的掺杂对陶瓷压电和介电性能的影响.实验结果表明,所有的样品都显示出四方相钙钛矿结构.材料的平均晶粒尺寸随着MnO2掺杂量的增加逐渐变大.MnO2的添加使样品的压电常数d33、平面机电耦合系数kp、机械品质因数Qm、介电损耗tanδ和相对密度均得到明显改善.当MnO2的掺杂量为0.50mol%的时候,样品的性能达到最佳:d33=144pC/N,kp=42%,tanδ=2.4%,Qm=168.以上数据表明,该陶瓷材料是一种极具应用潜力的无铅压电陶瓷材料.
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| 关 键 词： | 无铅压电陶瓷 压电常数 机电耦合系数 介电损耗 |
Preparation and Properties of MnO2 Doped KNN Based Lead-free Piezoceramics |
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| WENG Bao-zhen,DU Juan,LIAO Kai-ju,HUANG Zhen-feng,WANG Tan,WANG Chun-ming.Preparation and Properties of MnO2 Doped KNN Based Lead-free Piezoceramics[J].Journal of Liaocheng University:Natural Science Edition,2012(1):61-65. |
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| Authors: | WENG Bao-zhen DU Juan LIAO Kai-ju HUANG Zhen-feng WANG Tan WANG Chun-ming |
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| Institution: | 1.School of Materials Science and Engineering,Liaocheng University,Liaocheng 252059,China; 2.School of Physics,State Key Laboratory of Crystal Materials,Shandong University,Jinan 250100,China) |
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| Abstract: | (1-x)(Na0.65K0.35)0.94Li0.06NbO3-xmol%MnO2 lead-free piezoceramics were prepared by conventional solid-state sintering method and their dielectric and piezoelectric characteristics were investigated.All samples possess tetragonal perovskite phases.The average grain size increases gradually with increasing MnO2 content.Appropriate amount of MnO2 results in an improvement in piezoelectric constants d33,planar electromechanical coupling factors kp,mechanical quality factors Qm,dielectric loss tanδ and promotes densification of the(Na0.65K0.35)0.94Li0.06NbO3 ceramics.Enhanced piezoelectric and electromechanical properties are obtained with x=0.50: d33=144pC/N,kp=42%,tanδ=2.4% and Qm=168,showing that they could be promising candidates as lead-free piezoelectric materials. |
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| Keywords: | lead-free piezoceramics piezoelectric constant electromechanical coupling factor dielectric loss |
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