1. (100)-Textured KNN-based thick film with enhanced piezoelectric property for intravascular ultrasound imaging.
- Author
-
Benpeng Zhu, Zhiqiang Zhang, Teng Ma, Xiaofei Yang, Yongxiang Li, Shung, K. Kirk, and Qifa Zhou
- Subjects
LITHIUM ,METALLIC films ,ULTRASONIC imaging ,PIEZOELECTRIC devices ,SURFACE texture ,ELECTROMECHANICAL effects - Abstract
Using tape-casting technology, 35 μm free-standing (100)-textured Li doped KNN (KNLN) thick film was prepared by employing NaNbO
3 (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. [ABSTRACT FROM AUTHOR]- Published
- 2015
- Full Text
- View/download PDF