Abstract
In order to improve the flexibility of Pb(In1/2Nb 1/2)O3-Pb(Mg1/3Nb2/3)O 3-PbTiO3 (PIMNT) single crystal and make full use of the ultrahigh piezoelectric property in focused ultrasonic transducers, PIMNT/epoxy 1-3 composite with a volume fraction of 60% was prepared by a modified dice-and-fill method. Excellent properties for ultrasonic transducer applications have been achieved, such as higher thickness electromechanical coupling coefficient (kt = 84%), lower acoustic impedance (Z = 19 MRayls), and moderate dielectric constant (33T0=2040). Based on the improved flexibility of as-prepared PIMNT/epoxy 1-3 composite, a cylindrically shaped ultrasonic linear array has been designed, fabricated, and characterized. The cylindrically shaped ultrasonic linear array has achieved an ultra-broad bandwidth (-6 dB) of 128%, which is a significant improvement over the plane linear array. These promising results show that the PIMNT/epoxy 1-3 composite can be used to develop high-performance focused ultrasonic transducers.
| Original language | English |
|---|---|
| Pages (from-to) | 69-75 |
| Number of pages | 7 |
| Journal | Sensors and Actuators A: Physical |
| Volume | 192 |
| DOIs | |
| State | Published - 2013 |
| Externally published | Yes |
Keywords
- 1-3 piezoelectric composite
- PIMNT single crystal
- Ultrasonic linear array
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