Processing and Electrical Properties in Lead-Based (Pb(Mg1/3Nb2/3)O3, Pb(Yb1/2Nb1/2)O3, PbTiO3) Systems

Abstract

Lead-based ferroelectric (FE) ceramics exhibit superior electromechanical properties; therefore, there has been an increased focus on developing new lead-based FE materials with high Curie temperature (T-g) and enhanced properties. The aim of this study was to investigate new compositions in the Pb(Mg1/3Nb2/3) O-3-Pb(Yb1/2Nb1/2)O-3-PbTiO3 (PMN-PYbN-PT) system to enhance the electromechanical properties while increasing the T-c and lowering the sintering temperature. The 0.575[0.5PMN-0.5PYbN]-0.425PT composition at PMN/PYbN (50/50) mole ratio were prepared by reactive sintering PMNT and PYbNT powder mixtures at 950 degrees-1200 degrees C for 4 h. PMNT and PYbNT powders were calcined via the columbite method. Samples were prepared by cold isostatic pressing at 80 MPa. Dense and fully perovskite 0.575[0.5PMN-0.5PYbN]-0.425PT ceramics were fabricated at 975 degrees C for 4 h, and these samples displayed a remnant polarization (P-r) of 32 mu C/cm(2), coercive field (E-c) of 17 kV/cm, and a piezoelectric charge coefficient (d(33)) of 475 pC/N. It is proposed that this ternary system can be tailored for various applications.