Abstract In this study, to develop composition ceramics for energy harvesting devices, Pb(Ni1/3Nb2/3)O₃-Pb(Zr Ti)O₃ system ceramics substituted with Pb(Mg1/2W1/2)O₃ were manufactured by conventional mixed oxide method using Li₂CO₃ and Na₂CO₃ (LNCO) as sintering aids. Their microstructure and piezoelectric properties were also investigated. At the specimen sintered at 930℃, high values of piezoelectric properties appeared: the dielectric constant (εr) of 2,522 planar electromechanical coupling factor kp of 0.602, and k31 of 0.385, d31 = 229 [pC/N], g31 = 10.13 [mV.m/N], Qm of 70, respectively. These values were suitable for the application of devices such as energy harvesting devices and ultrasonic devices.
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