(100)-Textured KNN-based thick film with enhanced piezoelectric property for intravascular ultrasound imaging

Benpeng Zhu; Zhiqiang Zhang; Teng Ma; Xiaofei Yang; Yongxiang Li; K Kirk Shung; Qifa Zhou

doi:10.1063/1.4919387

(100)-Textured KNN-based thick film with enhanced piezoelectric property for intravascular ultrasound imaging

Appl Phys Lett. 2015 Apr 27;106(17):173504. doi: 10.1063/1.4919387. Epub 2015 Apr 28.

Authors

Benpeng Zhu, Zhiqiang Zhang¹, Teng Ma², Xiaofei Yang³, Yongxiang Li¹, K Kirk Shung², Qifa Zhou²

Affiliations

¹ Key Laboratory of Inorganic Functional Materials and Devices , Chinese Academy of Sciences, Shanghai 200050, China.
² Department of Biomedical Engineering, NIH Transducer Resource Center, University of Southern California , Los Angeles, California 90089-1111, USA.
³ School of Optical and Electronic Information, Huazhong University of Science and Technology , Wuhan 430074, China.

Abstract

Using tape-casting technology, 35 μm free-standing (100)-textured Li doped KNN (KNLN) thick film was prepared by employing NaNbO₃ (NN) as template. It exhibited similar piezoelectric behavior to lead containing materials: a longitudinal piezoelectric coefficient (d₃₃) of ∼150 pm/V and an electromechanical coupling coefficient (k_t ) of 0.44. Based on this thick film, a 52 MHz side-looking miniature transducer with a bandwidth of 61.5% at -6 dB was built for Intravascular ultrasound (IVUS) imaging. In comparison with 40 MHz PMN-PT single crystal transducer, the rabbit aorta image had better resolution and higher noise-to-signal ratio, indicating that lead-free (100)-textured KNLN thick film may be suitable for IVUS (>50 MHz) imaging.

Abstract

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