title: (100)-Textured KNN-based thick film with enhanced piezoelectric property for intravascular ultrasound imaging.
abstract: Using tape-casting technology, 35μm 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 (kt) 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.
authors.forename: Benpeng
authors.initials: B
authors.lastname: Zhu
authors.affiliation: Key Laboratory of Inorganic Functional Materials and Devices , Chinese Academy of Sciences, Shanghai 200050, China.
authors.forename: Zhiqiang
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: Department of Biomedical Engineering, NIH Transducer Resource Center, University of Southern California , Los Angeles, California 90089-1111, USA.
authors.forename: Teng
authors.initials: T
authors.lastname: Ma
authors.affiliation: School of Optical and Electronic Information, Huazhong University of Science and Technology , Wuhan 430074, China.
authors.forename: Xiaofei
authors.initials: X
authors.lastname: Yang
authors.affiliation: Key Laboratory of Inorganic Functional Materials and Devices , Chinese Academy of Sciences, Shanghai 200050, China.
authors.forename: Yongxiang
authors.initials: Y
authors.lastname: Li
authors.affiliation: Department of Biomedical Engineering, NIH Transducer Resource Center, University of Southern California , Los Angeles, California 90089-1111, USA.
authors.forename: K Kirk
authors.initials: KK
authors.lastname: Shung
authors.affiliation: Department of Biomedical Engineering, NIH Transducer Resource Center, University of Southern California , Los Angeles, California 90089-1111, USA.
authors.forename: Qifa
authors.initials: Q
authors.lastname: Zhou