(1-x)BiScO3-xPbTiO3 (BS-PT) ceramics exhibits excellent dielectric and piezoelectric properties in the vicinity of the morphotropic phase boundary (x=64.0% mol fraction PbTiO3), which separates the rhombohedral phase from tetragonal phase. In our study, the pure perovskite BS-PT ceramics was obtained with compositions near the MPB for x varying from 64.0% to 65.5% using traditional solid state reaction. The perovskite phase formation process and microstructure were investigated and also the dielectric and piezoelectric properties were studied. The results show that BS-PT ceramics with x=64.5% has an optimized piezoelectric characterization, its piezoelectric coefficient d33 can reach to as high as 500 pC/N at room temperature, the Curie temperature (Tc) can reach to 438℃, with the remnant polarization Pr=44μC/cm2, electrical field reduced strain 3.5‰. Our research results show that the BS-PT ceramics with the compositions near the morphotropic phase boundary is a good candidate material for the piezoelectric actuator and transducers.
FENG Ya-Jun
,
XU Zhuo
,
LI Zhen-Rong
,
ZHANG Lin
,
YAO Xi
. High Temperature Piezoelectric Ceramics (1-x)BiScO3-xPbTiO3 Near the Morphotropic Phase Boundary (MPB)[J]. Journal of Inorganic Materials, 2006
, 21(5)
: 1127
-1133
.
DOI: 10.3724/SP.J.1077.2006.01127
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