Increasing Performances of 1–3 Piezocomposite Ultrasonic Transducer by Alternating Current Poling Method
Ke Zhu,
Jinpeng Ma,
Yang Liu,
Bingzhong Shen,
Da Huo,
Yixiao Yang,
Xudong Qi,
Enwei Sun,
Rui Zhang
Affiliations
Ke Zhu
Department of Physics, Harbin Institute of Technology, Harbin 150080, China
Jinpeng Ma
School of Instrumentation Science and Engineering, Functional Materials and Acousto-Optic Instruments Laboratory, Harbin Institute of Technology, Harbin 150080, China
Yang Liu
School of Instrumentation Science and Engineering, Functional Materials and Acousto-Optic Instruments Laboratory, Harbin Institute of Technology, Harbin 150080, China
Bingzhong Shen
School of Instrumentation Science and Engineering, Functional Materials and Acousto-Optic Instruments Laboratory, Harbin Institute of Technology, Harbin 150080, China
Da Huo
School of Instrumentation Science and Engineering, Functional Materials and Acousto-Optic Instruments Laboratory, Harbin Institute of Technology, Harbin 150080, China
Yixiao Yang
School of Instrumentation Science and Engineering, Functional Materials and Acousto-Optic Instruments Laboratory, Harbin Institute of Technology, Harbin 150080, China
Xudong Qi
Key Laboratory for Photonic and Electronic Bandgap Materials, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, China
Enwei Sun
School of Instrumentation Science and Engineering, Functional Materials and Acousto-Optic Instruments Laboratory, Harbin Institute of Technology, Harbin 150080, China
Rui Zhang
School of Instrumentation Science and Engineering, Functional Materials and Acousto-Optic Instruments Laboratory, Harbin Institute of Technology, Harbin 150080, China
Ultrasonic transducers are the basic core component of diagnostic imaging devices, wherein the piezoelectric materials are the active element of transducers. Recent studies showed that the alternating current poling (ACP) method could develop the properties of piezocomposites, which had great potential to improve transducer performance. Herein, transducers (fc = 3 MHz) made of DCP and ACP 1–3 piezocomposites (prepared by PZT-5H ceramics and PMN-PT single crystals) were fabricated. The effect of the ACP method on the bandwidth and insertion loss (sensitivity) was explored. The results indicate that the ACP method can significantly enhance the bandwidth and slightly increase the insertion loss of transducers. Particularly, a superhigh bandwidth of 142.8% was achieved in the transducer of ACP 1–3 PMN-PT single crystal combined with suitable matching and backing layers. This bandwidth is higher than that of all reported transducers with similar center frequency. Moreover, the optimization mechanism of transducer performance by the ACP method was discussed. The obtained results suggested that the ACP is an effective and convenient technology to improve transducer performances, especially for the bandwidth.
