| 溶胶-凝胶法制备Bi0.5Na0.5TiO3陶瓷及其电学特性 |
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| 引用本文： | 赵明磊,王春雷,钟维烈,王矜奉,陈洪存.溶胶-凝胶法制备Bi0.5Na0.5TiO3陶瓷及其电学特性[J].物理学报,2003,52(1):229-232. |
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| 作者姓名： | 赵明磊 王春雷 钟维烈 王矜奉 陈洪存 |
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| 作者单位： | 山东大学物理系,山东大学晶体材料国家重点实验室,济南 250100 |
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| 基金项目： | 国家重点基础研究发展规划项目 (批准号 :G19980 614 0 8)资助的课题~~ |
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| 摘 要： | 用溶胶-凝胶工艺成功制备出Bi05Na05TiO3纳米微粉，并利用此微粉烧结出高致密度的Bi05Na05TiO3陶瓷.这种新工艺制备的Bi05Na05TiO3陶瓷，其压电性能远远高于普通方法制备的陶瓷，其中压电常数d33和机电耦合系数kt分别高达102×10-12C/N和58%.同时发现，对于这种Bi05Na05TiO3陶瓷，室温时只需施加100kV/cm左右的交变电场，就可得到矩形度极好的饱和回线，得到的剩余极化Pr和矫顽场Ec分别为32μC/cm2和61kV/cm.而在100℃以上只需施加35kV/cm的极化电场就可使样品充分极化.
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| 关 键 词： | 溶胶-凝胶 Bi05Na05TiO3纳米微粉 剩余极化 压电常数 机电耦合系数 |
| 收稿时间： | 2002-05-16 |
| 修稿时间： | 2002年5月16日 |
Electrical properties of (Bi0.5Na0.5)TiO3 ceramic prepared by sol-gel method |
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| Zhao Ming-Lei,Wang Chun-Lei,Zhong Wei-Lie,Wang Jin-Feng and Chen Hong-Cun.Electrical properties of (Bi0.5Na0.5)TiO3 ceramic prepared by sol-gel method[J].Acta Physica Sinica,2003,52(1):229-232. |
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| Authors: | Zhao Ming-Lei Wang Chun-Lei Zhong Wei-Lie Wang Jin-Feng and Chen Hong-Cun |
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| Abstract: | Bismuth sodium titanate Bi05Na05TiO3 ceramic with about 96% of theoretical density was prepared by sol-gel processing. The saturate P-E hysteresis loop can be obtained under a 100kV/cm AC electric field for the sol-gel processed Bi05Na05TiO3 ceramic and the remanent polarization Pr and coercive field Ec are 32μC/cm2 and 61kV/cm respectively. Moreover, from the piezoelectric measurements, this material fabricated by sol-gel processing was found to have increased piezoelectric constant d33=102×10-12C/N and electromechanical coupling factor kt=58%. Therefore, sol-gel method is a potential fabrication technique for this lead-free piezoelectric ceramic. |
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| Keywords: | sol gel method Na 0 5 Bi 0 5 TiO 3 nano powders remanent polarization piezoelectric constant electromechanical coupling factor |
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