Nanocomposite ultrasonic hydrophones

被引：28

作者：

Chan, HLW ^{[1
]}

Lau, ST ^{[1
]}

Kwok, KW ^{[1
]}

Zhang, QQ ^{[1
]}

Zhou, QF ^{[1
]}

Choy, CL ^{[1
]}

机构：

[1] Hong Kong Polytech Univ, Mat Res Ctr, Dept Appl Phys, Kowloon, Peoples R China

来源：

SENSORS AND ACTUATORS A-PHYSICAL | 1999年 / 75卷 / 03期

关键词：

PZT; P(VDF-TrFE); nanocomposite; hydrophone;

D O I：

10.1016/S0924-4247(99)00076-X

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Needle-type hydrophones for the calibration of medical ultrasonic transducers have been fabricated using lead zirconate titanate (PZT)/poly(vinylidene fluoride-trifluoroethylene) (PZT/P(VDF-TrFE)) 0-3 nanocomposite films. The 0-3 nanocomposite film has been prepared by incorporating nanosized PZT powder (derived from a sol-gel process) in a P(VDF-TrFE) matrix. Since the piezoelectric coefficients of PZT and P(VDF-TrFE) have opposite signs,the PZT and P(VDF-TrFE) phases In the nanocomposites have been poled in opposite directions in order to give enhanced piezoelectric activity. A nanocomposite hydrophone with 0.2 volume fraction of PZT has been characterized and found to be more sensitive than a P(VDF-TrFE) hydrophone of similar structure. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：252 / 256

页数：5

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