Broadband ultrasound transducers using a plate with a graded piezoelectric constant formed by an internal temperature gradient

被引：0
|
作者：
Yamada, K [1 ]
Yamazaki, D [1 ]
Nakamura, K [1 ]
机构：
[1] Tohoku Univ, Grad Sch Engn, Dept Elect & Commun Engn, Sendai, Miyagi 9808579, Japan
来源：
2000 IEEE ULTRASONICS SYMPOSIUM PROCEEDINGS, VOLS 1 AND 2 | 2000年
关键词：
D O I：
暂无
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
Broadband ultrasound transducers composed of a piezoelectric plate having a graded piezoelectric parameter are investigated. Grading of the piezoelectric constant e(33) is performed by giving an appropriate temperature gradient in the thickness direction of a fully-polarized piezoceramic plate which has a low Curie temperature. The broadband frequency characteristic of the proposed transducer is confirmed by experiments of wave generation in water by driving with a spike-shaped broadband electric pulse. The experimental results obtained for the graded plate with a matched backing clearly show the capability of launching a very short ultrasonic pulse and demonstrate the effectiveness of the piezoelectrical grading.
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收藏
页码：1017 / 1020
页数：4
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