TY - JOUR
T1 - Lead-Free KNN-Based Textured Ceramics for High-Frequency Ultrasonic Transducer Application
AU - Quan, Yi
AU - Fei, Chunlong
AU - Ren, Wei
AU - Wang, Lingyan
AU - Niu, Gang
AU - Zhao, Jinyan
AU - Zhuang, Jian
AU - Zhang, Junshan
AU - Zheng, Kun
AU - Lin, Pengfei
AU - Sun, Xinhao
AU - Chen, Qiang
AU - Ye, Zuo Guang
AU - Karaki, Tomoaki
N1 - Publisher Copyright:
© 1986-2012 IEEE.
PY - 2021/5
Y1 - 2021/5
N2 - Environment-friendly lead-free piezoelectric materials with excellent piezoelectric properties are needed for high-frequency ultrasonic transducer applications. Recently, lead-free 0.915(K0.45Na0.5Li0.05)NbO3-0.075BaZrO 3-0.01(Bi0.5Na0.5)TiO3 (KNLN-BZ-BNT) textured piezo- electric ceramics have high piezoelectric response, superior thermal stability, and excellent fatigue resistance, which are promising for devices applications. In this work, the KNLN-BZ-BNT textured ceramics were prepared by the tape-casting method. Microstructural morphology, phase transition, and electrical properties of KNLN-BZ-BNT textured ceramics were investigated. High-frequency needle-type ultrasonic transducers were designed and fabricated with these textured ceramics. The tightly focused transducers have a center frequency higher than 80 MHz and a -6-dB fractional bandwidth of 52%. Such transducers were built for an {f} -number close to 1, and the desired focal depth was achieved by press-focusing technology associated with a set of customer design fixture. Its lateral resolution was better than 90~mu text{m} by scanning a 15- mu text{m} tungsten wire target. These promising results demonstrate that the lead-free KNLN-BZ-BNT textured ceramic is a good candidate for high-frequency ultrasonic transducer applications.
AB - Environment-friendly lead-free piezoelectric materials with excellent piezoelectric properties are needed for high-frequency ultrasonic transducer applications. Recently, lead-free 0.915(K0.45Na0.5Li0.05)NbO3-0.075BaZrO 3-0.01(Bi0.5Na0.5)TiO3 (KNLN-BZ-BNT) textured piezo- electric ceramics have high piezoelectric response, superior thermal stability, and excellent fatigue resistance, which are promising for devices applications. In this work, the KNLN-BZ-BNT textured ceramics were prepared by the tape-casting method. Microstructural morphology, phase transition, and electrical properties of KNLN-BZ-BNT textured ceramics were investigated. High-frequency needle-type ultrasonic transducers were designed and fabricated with these textured ceramics. The tightly focused transducers have a center frequency higher than 80 MHz and a -6-dB fractional bandwidth of 52%. Such transducers were built for an {f} -number close to 1, and the desired focal depth was achieved by press-focusing technology associated with a set of customer design fixture. Its lateral resolution was better than 90~mu text{m} by scanning a 15- mu text{m} tungsten wire target. These promising results demonstrate that the lead-free KNLN-BZ-BNT textured ceramic is a good candidate for high-frequency ultrasonic transducer applications.
KW - Ferroelectrics
KW - physical acoustics
KW - transducers & transducer materials
UR - https://www.scopus.com/pages/publications/85104956858
U2 - 10.1109/TUFFC.2020.3039120
DO - 10.1109/TUFFC.2020.3039120
M3 - 文章
C2 - 33242305
AN - SCOPUS:85104956858
SN - 0885-3010
VL - 68
SP - 1979
EP - 1987
JO - IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
JF - IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
IS - 5
M1 - 9272295
ER -