| 便携式电子设备用无铅压电扬声器的研制 |
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| 引用本文： | 李慧,王宁,王博,胡东洋,冯坤鹏,张洋洋.便携式电子设备用无铅压电扬声器的研制[J].人工晶体学报,2017,46(12):2491-2496. |
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| 作者姓名： | 李慧 王宁 王博 胡东洋 冯坤鹏 张洋洋 |
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| 作者单位： | 黄河科技学院信息工程学院,郑州,450006 |
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| 基金项目： | 郑州市科技局项目(20140755,121PYFZX178);河南省教育厅科学技术重点项目(14B510005);黄河科技学院自然科学研究项目(KYZR201306) |
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| 摘 要： | 用丝网印刷法在印有Pt电极的Al2O3基片上制备了BaTiO3(BT)掺杂Bi0.5(Na0.82K0.18)0.5 TiO3(BNKT)厚膜,研究了BT掺杂对BNKT厚膜相结构、微观形貌、介电、压电及铁电性能的影响.研究发现,(1-x)BNKT-xBaTiO3厚膜体系的准同型相界(MPB)位于3mol;
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| 关 键 词： | 无铅压电厚膜 铁电性能 BNKT 无铅压电扬声器 |
Development of the Lead-Free Piezoelectric Speakers for Portable Electric Devices |
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| LI Hui,WANG Ning,WANG Bo,HU Dong-yang,FENG Kun-peng,ZHANG Yang-yang.Development of the Lead-Free Piezoelectric Speakers for Portable Electric Devices[J].Journal of Synthetic Crystals,2017,46(12):2491-2496. |
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| Authors: | LI Hui WANG Ning WANG Bo HU Dong-yang FENG Kun-peng ZHANG Yang-yang |
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| Abstract: | BaTiO3-doped Bi0.5(Na0.82 K 0.18)0.5TiO3 lead-free thick films were prepared on Pt-electroded alumina substrates using screen printing , their phase structure , microstructure , dielectric , piezoelectric and ferroelectric properties were investigated .The results show that the morphotropic phase boundary (MPB) of (1-x)BNKT-xBaTiO3 thick films was in the x range of 3mol;-7mol;.5mol; BT-doped BNKT (95BNKT-5BT) thick films exhibited preferable relative dielectric constant of 793, piezoelectric coefficient of 72 pC/N, remnant polarization of 4.35 μC/cm2 , unipolar strain value of 0.817;. However, the addition of 5mol; BT increases the dielectric loss from 1.1; to 6.2;, and also increases the coercive field from 35.77 kV/cm to 53.72 kV/cm.In the end, the prepared 95BNKT-5BT thick films were used to make the soud film , with the help of the driver circuit , the lead-free piezoelectric speaker for protable electronic device was developed . |
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