P2O-4 New Low-Q Ceramic Piezocomposites for Ultrasonic Transducer Applications

A new family of polymer-free ceramic piezocomposites with properties combining better parameters of PZT, PN type ceramics and 1-3 composites for wide-band ultrasonic transducer applications is presented. New "damped by scattering" ceramic piezocomposites were developed based on the original microstructural designing 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 (340degC), low acoustic impedance (15-20 MRayl) in a wide working frequency range (0.2-12 MHz)