| 聚丙烯压电驻极体薄膜声电传感器的性能 |
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| 引用本文： | 游琼,张晓青.聚丙烯压电驻极体薄膜声电传感器的性能[J].压电与声光,2013,35(6):849-852. |
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| 作者姓名： | 游琼 张晓青 |
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| 作者单位： | (上海市特殊人工微结构材料及技术重点实验室，同济大学 物理科学与工程学院，上海 200092) |
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| 基金项目： | 国家自然科学基金资助项目(批准号：51173137)；中央高校基本科研业务费专项基金资助项目（同济大学2012） |
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| 摘 要： | 压电驻极体（也称为铁电驻极体）是以空间电荷驻极体为基体的一类新型压电功能材料，这种材料不仅具有与压电陶瓷相近的压电活性，同时拥有柔韧、低介电常数和低声阻抗等特点。本研究制备了基于聚丙烯（PP）压电驻极体薄膜的声电传感器，并采用电压放大电路和电荷放大电路对其在声频下的灵敏度进行了测量。结果表明，PP压电驻极体声电传感器在1 kHz下的电压灵敏度约为0.8 mV/Pa，并在300 Hz~10 kHz的声频范围内有良好的线性输出特性。
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| 关 键 词： | 声电传感器 压电驻极体 灵敏度 频率响应 聚丙烯 |
Performance of Acoustoelectric Transducer Based on Polypropylene Piezoelectret Films |
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| YOU Qiong and ZHANG Xiaoqing.Performance of Acoustoelectric Transducer Based on Polypropylene Piezoelectret Films[J].Piezoelectrics & Acoustooptics,2013,35(6):849-852. |
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| Authors: | YOU Qiong and ZHANG Xiaoqing |
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| Affiliation: | (Shanghai Key Lab. of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering,Tongji University, Shanghai 200092, China) |
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| Abstract: | The piezoelectret, also known as ferroelectrets, is a new kind of space charge electrets with piezoelectric effect. Such material not only exhibits piezoelectric activity comparable to piezoelectric ceramics, but also is with flexibility, low dielectric constant and low acoustic impedance. In this article, the fabrication of the acoustoelectric transducers based on polypropylene (PP) piezoelectret films is described first, and then their sensitivities in the audible frequency range are investigated by both voltage and charge amplifier circuits. The results show that the typical voltage sensitivity of the fabricated transducers is around 0.8 mV/Pa at 1 kHz, and the response curves are relatively flat in the range of 300 Hz~10 kHz. |
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| Keywords: | acoustoelectric transducer piezoelectret sensitivity frequency response polypropylene |
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