Selection criteria of piezoelectric materials for double-parabolic-reflectors ultrasonic transducers (DPLUS) for high-power ultrasound
Selection criteria of piezoelectric materials for double-parabolic-reflectors ultrasonic transducers (DPLUS) for high-power ultrasound
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DOI：
10.35848/1347-4065/ac1fb9
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发表时间：
2021
影响因子：
1.5
通讯作者：
Kang Chen;T. Irie;T. Iijima;Takashi Kasashima;Kota Yokoyama;T. Morita
中科院分区：
文献类型：
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作者：
Kang Chen;T. Irie;T. Iijima;Takashi Kasashima;Kota Yokoyama;T. Morita
为了使双抛物面波导超声换能器（DPLUS）适用于大功率超声应用，研究了DPLUS压电材料的选择标准。制备了四种压电材料：两种锆钛酸铅（PZT）类型和两种无铅类型。对于DPLUS波导的非谐振激励，压电常数e和压电材料厚度是两个重要的评价指标。PZT 5 H被认为是最好的候选者。对于DPLUS波导的谐振激励，应区分两种情况。对于低频模式激励，所讨论的模式匹配问题是必不可少的。对于高频模式激励，压电材料的高功率特性对于改善DPLUS的振动输出是重要的; LFP 0202被认为是最佳候选者。低频模式可以达到8 m s-1的最大峰值振动速度，但高频模式小于2 m s-1。研究结果对于设计适用于各种高功率超声应用的DPLUS具有重要意义。
To suit double parabolic reflectors wave-guided ultrasonic transducer (DPLUS) for high-power ultrasound applications, we investigated the selection criteria of piezoelectric materials for DPLUS. Four piezoelectric materials were prepared: two lead–zirconate–titanate (PZT) types and two lead-free types. For non-resonant excitation of the DPLUS waveguide, the piezoelectric constant e and the thickness of piezoelectric materials are two important evaluation indexes. PZT 5H was found as the best candidate. For resonant excitation of the DPLUS waveguide, two situations should be distinguished. For low-frequency modes excitation, the discussed modes matching issue is essential. For high-frequency modes excitation, high-power properties of the piezoelectric material are important for improving the vibration output of DPLUS; LFP 0202 was found as the best candidate. Low-frequency modes can achieve 8 m s−1 of maximum peak vibration velocity, but high-frequency modes were smaller than 2 m s−1. Results are important to design the DPLUS for various high-power ultrasound applications.