Lead-free BNT composite film for high-frequency broadband ultrasonic transducer applications

Xingwei Yan; Hongfen Ji; Kwok Lam; Ruimin Chen; Fan Zheng; Wei Ren; Qifa Zhou; K. Shung

doi:10.1109/TUFFC.2013.2726

Lead-free BNT composite film for high-frequency broadband ultrasonic transducer applications

Xingwei Yan
, Hongfen Ji
, Kwok Lam
, Ruimin Chen
, Fan Zheng
, Wei Ren
, Qifa Zhou
, K. Shung

电子与信息学部

Xi'an Jiaotong University
University of Southern California

科研成果: 期刊稿件 › 文章 › 同行评审

33 引用（Scopus）

摘要

A lead-free Bi_0.5Na_0.5TiO₃ (BNT) piezoelectric composite thick film with a thickness of ̃11 μm has been fabricated using a modified sol-gel method. Dielectric constant, remnant polarization, and coercive field of the BNT composite film were found to be 1018, 22.6 μC/cm₂, and 76.1 kV/cm, respectively. The film was used to fabricate a high-frequency needle transducer and the performance of the transducer was measured. The transducer without a matching layer exhibits a center frequency of 98 MHz and a -6-dB bandwidth of 86%. A wire phantom image acquired using the transducer shows an axial resolution of 15 ¿m and lateral resolution of 68 μm, respectively. Results from this study suggest that the BNT composite film is a promising lead-free piezoelectric material for high-frequency broadband ultrasonic transducer applications.

源语言	英语
期刊论文编号	6552404
页（从-至）	1533-1537
页数	5
期刊	IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
卷	60
期	7
DOI	https://doi.org/10.1109/TUFFC.2013.2726
出版状态	已出版 - 2013

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10.1109/TUFFC.2013.2726

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abstract = "A lead-free Bi0.5Na0.5TiO3 (BNT) piezoelectric composite thick film with a thickness of{\~ }11 μm has been fabricated using a modified sol-gel method. Dielectric constant, remnant polarization, and coercive field of the BNT composite film were found to be 1018, 22.6 μC/cm2, and 76.1 kV/cm, respectively. The film was used to fabricate a high-frequency needle transducer and the performance of the transducer was measured. The transducer without a matching layer exhibits a center frequency of 98 MHz and a -6-dB bandwidth of 86\%. A wire phantom image acquired using the transducer shows an axial resolution of 15 ¿m and lateral resolution of 68 μm, respectively. Results from this study suggest that the BNT composite film is a promising lead-free piezoelectric material for high-frequency broadband ultrasonic transducer applications.",

author = "Xingwei Yan and Hongfen Ji and Kwok Lam and Ruimin Chen and Fan Zheng and Wei Ren and Qifa Zhou and K. Shung",

year = "2013",

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T1 - Lead-free BNT composite film for high-frequency broadband ultrasonic transducer applications

AU - Yan, Xingwei

AU - Ji, Hongfen

AU - Lam, Kwok

AU - Chen, Ruimin

AU - Zheng, Fan

AU - Ren, Wei

AU - Zhou, Qifa

AU - Shung, K.

PY - 2013

Y1 - 2013

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Lead-free BNT composite film for high-frequency broadband ultrasonic transducer applications

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