Abstract
Lead indium niobate-lead magnesium niobate-lead titanate (PIMNT) crystals have been used to fabricate longitudinal vibrator broadband tonpilz transducers as active piezoelectric material. Compared to lead magnesium niobate-lead titanate (PMNT), rhombohedral-to-tetragonal phase transition temperature (Trt) of PIMNT increases to higher than 120° C and coercive field (Ec) can reach 5kV/cm, while possessing the similar electromechanical properties. The PIMNT single crystal transducer can work under high temperature exceeding 80° C and large drive voltage over 0.6MVpp/m with a DC bias field of 0.27MV/m.Simultaneously, the device shows a smaller size, as much as 10dB higher transmitting voltage response and 8dB higher receiving voltage response than lead zirconate titanate (PZT) longtitudinal vibrator(tonpliz) transducer with a broad bandwidth over 150%. The PIMNT device demonstrates tremendous performance for sonar and ultrasonic technology.
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