High-Performance Piezoelectric Characteristics of Sm Substituted Pb(Ni,Nb)O3-Pb(Zr,Ti)O3-Pb(Mg,W)O3 System Ceramics for Ultrasonic Transducer Application

In this paper, in order to develop composition ceramics for an acoustic emission sensor application for nondestructive testing, Pb(Ni,Nb-2/3)O-3-Pb(Zr,Ti)O-3-Pb(Mg,W)O-3 [PNN-PZT-PMW] system ceramics were manufactured by conventional mixed oxide method using Li2CO3 and CaCO3 as sintering aids. Their microstructural, dielectric and piezoelectric properties were also investigated. At x = 0.0075 Sm, the substituted specimen sintered at 980 (degrees C), and high values of piezoelectric properties appeared: the dielectric constant (epsilon(r)) of 2824, piezoelectric coefficient d(33) of 630 [pC/N], planar electromechanical coupling factor k(p) of 0.665, piezoelectric voltage constant g(33) of 25.2 [mV.m/N], and high Curie temperature (Tc) = 270 (degrees C), respectively. These values were applicable for devices such as acoustic emission sensor and ultrasonic transducer.

Automated summary

In this study, composite ceramics for an acoustic emission sensor application for nondestructive testing were developed using PNN-PZT-PMW system ceramics, which exhibited high piezoelectric properties suitable for devices such as piezoelectric sensors and ultrasonic transducers.