Fine‐Scaled Piezoelectric Ceramic/Polymer 2‐2 Composites for High‐Frequency Transducer |
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| Authors: | Ye Zhang Yun Jiang Xiujuan Lin Rui Xie Kechao Zhou Tim W. Button Dou Zhang |
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| Affiliation: | 1. State Key Laboratory of Powder Metallurgy, Central South University, , Changsha, Hunan, 410083 China;2. School of Metallurgy and Materials, University of Birmingham, , Edgbaston, Birmingham, B15 2TT UK |
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| Abstract: | A novel technique was utilized to fabricate fine‐scaled piezoelectric ceramic/polymer 2‐2 composites for high‐frequency ultrasonic transducers. Lead zirconate titanate (PZT) was used as raw material. Tape‐casted acetylene black tapes were used to define kerfs after sintering. A one‐directional supporter was utilized to avoid distortion of PZT elements. PZT elements with 20 ± 2 μm width exhibited good consistency in longitudinal direction. A resonant method was utilized to evaluate the piezoelectric and dielectric properties of the composites. A 72‐μm‐thick composite with an aspect ratio of ~3.6 exhibited a kt of 0.61 with satisfied piezoelectric and dielectric properties. A prototype high‐frequency ultrasonic transducer was fabricated and evaluated by an underwater pulse‐echo test. The center frequency was found to be 23.75 MHz, with ?6 dB bandwidth of 5.5 MHz. |
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