Fabrication of ultrasonic transducers with KNbO3 piezoelectric single crystal for detecting harmonic signals

被引：0
|
作者：
Adachi, Hideo [1 ]
Wakabayashi, Katsuhiro [1 ]
Nishio, Masahiro [1 ]
Ogawa, Haruo [1 ]
Kamakura, Tomoo [2 ]
机构：
[1] Olympus Optical Co., LTD., 2951 Ishikawa-cho, Hachioji 192-8507, Japan
[2] University of Electro-Communications, 1-5-1 Chofugaoka, Chofu 192-8585, Japan
来源：
Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers | 2001年 / 40卷 / 9 B期
关键词：
Acoustic variables measurement - Correlation methods - Harmonic analysis - Imaging systems - Piezoelectric materials - Potassium compounds - Resonators - Sensitivity analysis - Signal receivers - Signal to noise ratio - Single crystals - Ultrasonic waves;
D O I：
10.1143/jjap.40.5698
中图分类号：
学科分类号：
摘要：
An ultrasonic transducer with a circular aperture has been designed and fabricated for the development of a harmonic imaging system with high sensitivity. The transducer consists of two piezoelectric elements; one is made from Pb(Zr, Ti)O3 (PZT) ceramics for transmitting a finite-amplitude ultrasonic pulse, and the other is made from a KNbO3 (KN) piezoelectric single crystal for receiving second harmonic signals generated in a nonlinear medium. They are arranged coaxially. Using this transducer, acoustic characteristics were measured and the observation of sponge phantom images was performed. Compared with other transducers with PZT and PbTiO3 (PT) ceramics, we have confirmed that higher sensitivity and stronger correlation between the sensitivity and figure-of-merit can be obtained. Additionally, the third harmonic detection has been demonstrated.
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页码：5698 / 5702
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