用于高性能换能器应用的镁合金匹配层。
Magnesium Alloy Matching Layer for High-Performance Transducer Applications.
机构信息
National Engineering Research Center of Light Alloy Net Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
Department of Instrument Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
出版信息
Sensors (Basel). 2018 Dec 14;18(12):4424. doi: 10.3390/s18124424.
In this paper, we report the use of magnesium alloy (AZ31B) as the matching material for PZT-5H ultrasonic transducers. The AZ31B has an acoustic impedance of 10.3 MRayl, which provides a good acoustic impedance match for PZT-5H ultrasonic transducers in water medium based on the double matching layer theory. Two PZT-5H transducers with different center frequencies were designed and fabricated using the AZ31B. The respective center frequencies of the two fabricated transducers were 4.6 MHz and 9.25 MHz. The 4.6 MHz transducer exhibits a -6 dB bandwidth of 79% and two-way insertion loss of -11.11 dB. The 9.25 MHz transducer also shows good performance: -6 dB bandwidth of 71% and two-way insertion loss of -14.43 dB. The properties of the two transducers are superior to those of transducers using a composite matching layer, indicating that the magnesium alloy may be a promising alternative for high-performance transducers.
本文报道了将镁合金（AZ31B）用作 PZT-5H 超声换能器的匹配材料。根据双层匹配层理论，AZ31B 的声阻抗为 10.3MRayl，可与水中的 PZT-5H 超声换能器实现良好的声阻抗匹配。设计并制作了两个中心频率不同的 PZT-5H 换能器，其中心频率分别为 4.6MHz 和 9.25MHz。4.6MHz 换能器的-6dB 带宽为 79%，双向插入损耗为-11.11dB。9.25MHz 换能器也表现出良好的性能：-6dB 带宽为 71%，双向插入损耗为-14.43dB。这两个换能器的性能优于使用复合匹配层的换能器，表明镁合金可能是高性能换能器的一种有前途的替代品。
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