TY - JOUR
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
N2 - 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.
AB - 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.
UR - https://www.scopus.com/pages/publications/84880402011
U2 - 10.1109/TUFFC.2013.2726
DO - 10.1109/TUFFC.2013.2726
M3 - 文章
C2 - 25004521
AN - SCOPUS:84880402011
SN - 0885-3010
VL - 60
SP - 1533
EP - 1537
JO - IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
JF - IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
IS - 7
M1 - 6552404
ER -