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Elastic, piezoelectric, and dielectric characterization of modified BiScO3-PbTiO3 ceramics.

IEEE transactions on ultrasonics, ferroelectrics, and frequency control (2006-01-21)
Shujun Zhang, Edward F Alberta, Richard E Eitel, Clive A Randall, Thomas R Shrout
ABSTRACT

The perovskite solid solution system (1-x)BiScO3-(x)PbTiO3 represents an interesting new family of high-temperature piezoelectric materials. Compositions near the morphotropic phase boundary (x approximately 0.64) have been reported to have high Curie temperatures (Tc > 450 degrees C) and good piezoelectric coefficients (d33 approximately 460 pC/N). In this work, manganese additions were used to improve the high-temperature electrical resistivity and RC time constant of compositions near the morphotropic phase boundary. The addition of manganese was found to shift Tc to slightly lower temperatures (442 degrees C and 456 degrees C for x = 0.64 and x = 0.66, respectively). The piezoelectric activities of the modified materials were found to be reduced slightly due to the hardening effect of manganese; however, the temperature stability and resistivity of the modified materials were significantly enhanced. In this paper we present, for the first time, a complete set of materials constants, including the elastic (sij, cij), piezoelectric (dij, eij, gij, hij), dielectric (epsilonij, betaij), and electromechanical (kij) coefficients and compare them to both unmodified 0.36BiScO3-0.64PbTiO3 and PZT5A ceramics.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Lead oxide, red powder, 1-2 μm, 99%
Sigma-Aldrich
Lead(II,IV) oxide, ≥96%