Abstract
A new family of polymer-free ceramic piezocomposites with properties combining better parameters of PZT and PN type ceramics and 1–3 composites for wide-band NDT ultrasonic transducer applications is presented. New “damped by scattering” ceramic piezocomposites were developed based on the original microstructural design concept and characterized by previously unachievable low Q M (Q M t = 2–5) combined with high piezoelectric (d 33 = 250–350) and electromechanical (k t = 0.45–0.5) parameters, high Curie point (340°C), low acoustic impedance (15–20 MRayl) in a wide working frequency range (0.2–12 MHz). Complex sets of elastic, dielectric, and piezoelectric parameters of the new piezocomposites were systematically studied using impedance spectroscopy approach and ultrasonic method.
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