High-frequency ultrasonic transducer based on lead-free BSZT piezoceramics

被引：47
|
作者：
Lee, S. T. F. [1 ]
Lam, K. H.
Zhang, X. M.
Chan, H. L. W.
机构：
[1] Hong Kong Polytech Univ, Dept Appl Phys, Kowloon, Hong Kong, Peoples R China
来源：
ULTRASONICS | 2011年 / 51卷 / 07期
关键词：
High-frequency transducer; Lead-free;
D O I：
10.1016/j.ultras.2011.03.009
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
This paper describes the fabrication and evaluation of a high-frequency (40 MHz) transducer based on lead-free piezoceramics for ultrasonic imaging. The transducer with an aperture size of 0.9 mm has been fabricated using barium strontium zirconate titanate ((Ba0.95Sr0.05)(Zr0.05Ti0.95)O-3, abbreviated as BSZT) ceramics. The lead-free BSZT has a piezoelectric d(33) coefficient of 300 pC/N and an electromechanical coupling factor k(t) of 0.45. High-frequency ultrasound transducers were fabricated and a bandwidth of 76.4% has been achieved with an insertion loss of -26 dB. Applications in high resolution biological and medical imaging could be possible with this lead-free material. (C) 2011 Elsevier B. V. All rights reserved.
引用
收藏
页码：811 / 814
页数：4
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