Characterization of perovskite piezoelectric single crystals of 0.43BiScO3-0.57PbTiO3 with high Curie temperature

The perovskite single crystal solid solution of 0.43BiScO(3)-0.57PbTiO(3) (BSPT57) was reported to possess a high Curie temperature (T(C)similar to402 degreesC) and rhombohedral to tetragonal phase transition temperature (T(R-T)similar to349 degreesC) with excellent electromechanical properties (k(33)similar to90%). In this work, the resonance method was used to determine all of the eleven electromechanical coefficients of the BSPT57 piezocrystals using five Z-cut samples. The complete set of materials constants, including the elastic s(ij), c(ij), piezoelectric d(ij), e(ij), g(ij), h(ij), dielectric epsilon(ij), beta(ij), and electromechanical k(ij) values were derived from the experimental data. The BSPT57 crystal was found to be a promising material for piezoelectric applications, which is comparable to the properties of the Pb(Zn1/3Nb2/3)O-3-PbTiO3 and Pb(Mg1/3Nb2/3)O-3-PbTiO3 relaxor-PT single crystals, but has a much high-temperature stability. (C) 2004 American Institute of Physics.