期刊
SENSORS AND ACTUATORS A-PHYSICAL
卷 196, 期 -, 页码 70-77出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.sna.2013.03.014
关键词
PIMNT single crystal; 2-2 piezoelectric composite; Ultrasonic transducer
资金
- Ministry of Science and Technology of China through 973 Program [2013CB632900, 2009CB623305]
- Natural Science Foundation of China [61001041, 11090332, 51272268]
- Science and Technology Commission of Shanghai Municipality [12DZ0501000]
- Shanghai Rising-Star Program [11QA1407500]
- Open Project from Shanghai Institute of Technical Physics, CAS [IIMDKFJJ-11-08]
- Fund of Shanghai Institute of Ceramics [Y29ZC4140G]
- The Hong Kong Polytechnic University [G-YK69, 1-ZV7P]
In order to take the full advantage of excellent beam-mode piezoelectric and acoustic properties of Pb(In1/2Nb1/2)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 (PIMNT) single crystal, PIMNT/epoxy 2-2 composite was designed and prepared with PIMNT volume percent of 69. Excellent properties for ultrasonic transducer applications were achieved, including ultrahigh thickness electromechanical coupling coefficient (k(t) = 86%), large piezoelectric coefficient (d(33) = 1200 pC/N), and low acoustic impedance (Z similar to 20 MRayls). Based on the improved properties, a 2 MHz PIMNT/epoxy 2-2 composite ultrasonic transducer was designed, fabricated, and its performance was compared with a PIMNT/epoxy 1-3 composite ultrasonic transducer and a PIMNT single-crystal ultrasonic transducer, respectively. The PIMNT/epoxy 2-2 composite ultrasonic transducer showed a significant enhancement in both relative pulse-echo sensitivity and -6 dB bandwidth, which were 4 dB higher and 20% broader than those of the PIMNT single-crystal ultrasonic transducer and as excellent as the PIMNT/epoxy 1-3 composite ultrasonic transducer. These promising results suggested the great potential for developing high-performance ultrasonic transducers using the PIMNT/epoxy 2-2 composite. (c) 2013 Elsevier B.V. All rights reserved.
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