Abstract
Mn-doped 0.7BiFeO3-0.3BaTiO3 (BFO-0.3BTO+Mn 1% mol) lead-free piezoelectric ceramic were fabricated by traditional solid state reaction. The phase structure, microstructure, and ferroelectric properties were investigated. Additionally, lead-free 1–3 composites with 60% volume fraction of BFO-BTO+Mn ceramic were fabricated for ultrasonic transducer applications by a conventional dice-and-fill method. The BFO-BTO+Mn 1-3 composite has a higher electromechanical coupling coefficient (kt = 46.4%) and lower acoustic impedance (Za ~ 18 MRayls) compared with that of the ceramic. Based on this, lead-free piezoelectric ceramic composite, single element ultrasonic transducer with a center frequency of 2.54 MHz has been fabricated and characterized. The single element transducer exhibits good performance with a broad bandwidth of 53%. The insertion loss of the transducer was about 33.5 dB.
Original language | English |
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Pages (from-to) | 127-134 |
Number of pages | 8 |
Journal | Actuators |
Volume | 4 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2015 |
Keywords
- Lead-free ceramic
- 1-3 composite
- Ultrasonic transducer
ASJC Scopus subject areas
- Control and Systems Engineering
- Control and Optimization