Modified relaxor-PbTiO3 piezoelectrics for high temperature applications
RIS ID
107565
Abstract
In this study, Pb1-x(Yb1/2Nb1/2) 0.515Ti0.485O3-x{(2SrO + BaO)/3} [PYNT-SBx] compositions with x = 0.00-0.05 at the rhombohedral side near the morphotropic phase boundary were investigated. The SB substitution for Pb2+ in PYNT was found to increase the tetragonality, but greatly reduce the Curie temperature (T c) and broaden the dielectric permittivity maximum. The temperature dependence of the relative permittivity follows a Curie-Weiss law above the deviation temperature (TD) at high temperatures for the SB-doped PYNT. The optimized properties with a piezoelectric coefficient of 610 pm V-1, maximum dielectric constant (εmax) of 25,000 (at the T c = 315°C and 1 kHz), and a remnant polarization (Pr) of 33 μC cm-2 were obtained in PYNT-SB0.04 ceramics. 2011 Taylor &Francis.
Publication Details
Lim, J. Bong., Zhang, S. & Shrout, T. R. (2011). Modified relaxor-PbTiO3 piezoelectrics for high temperature applications. Phase Transitions: a multinational journal, 84 (2), 95-102.