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This paper deals with advanced characterization approaches of thin piezoelectric materials enabling accurate modelling of low frequency (<50Hz) bimorph-based cantilever beam. Such structures had been widely studied and actual devices using bulk PZT materials had exhibited the best FoM (Figure of Merit) compared to thin and thick piezoelectric films generally used in MEMS industry. Bulk piezoelectric...
This work presents the fabrication of a 30 MHz, linear-array transducer based on a KN, 1–3 piezocomposite. Performances of the transducer were characterized and compared to a PZT-based linear array with similar structure. The composites were designed to minimize lateral modes of vibration which can severely degrade imaging performances. Fabrication steps were optimized to achieve a 40 MHz resonant...
Lead-based piezoelectric single crystals such as PZN-PT and PMN-PT have been first developed for under water applications by the U.S. Navy. Their outstanding piezoelectric properties (d33 as high as 2000 pC/N and k33 > 90%) make them valuable for high-end ultrasound transducers. Thus, they have been successfully used and commercialized in medical field mainly for cardiac imaging (2-5 MHz) but manufacturing...
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