| Structure and Electrical Properties of （Na0.5Bi0.5）0.94Ba0.06TiO3 Ceramicwith0.5wt% of MnO |
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| 引用本文： | 刘维华,徐庆.Structure and Electrical Properties of （Na0.5Bi0.5）0.94Ba0.06TiO3 Ceramicwith0.5wt% of MnO[J].武汉理工大学学报(材料科学英文版),2008,23(4):499-502. |
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| 作者姓名： | 刘维华 徐庆 |
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| 作者单位： | [1]School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China; [2]Faculty of Advanced Materials Engineering, Chonbuk National University, Chonju 561756, Korea |
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| 基金项目： | Jointly Funded by the National Natural Science Foundation of China （No. 50272044 and 50411140529） and by the Korea Science and Engineering Foundation （No. F01-2004-000-10084-0） |
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| 摘 要： | The structure and electrical properties of （Na0.5Bi0.5）0.94Ba0.06TiO3 ceramic doped with 0.5 wt% of MnO were investigated in comparison with those of （Na0.5Bi0.5）0.94Ba0.06TiO3 ceramic. It was ascertained that the MnO addition did not cause remarkable change in crystal structure and microstructure. The MnO addition mainly displayed a hard effect on the electrical properties, an increase of coercive field （E） and mechanical quality factor （Qm） together with a decrease of dielectric constant （εr） and piezoelectric constant （d33）. An enhancement of electromechanical coupling factor （kp） with the MnO addition was obtained too. An essential relation between the piezoelectric properties and ferroelectric nature of the ceramics was detected. It was found that the piezoelectric properties of the ceramics highly depended on the corporative contribution of remanent polarization （Pt） and coercive field.
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| 关 键 词： | 钠铋化合物 氧化物 制陶业 压电性 铁电现象 |
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