Research Paper

High Temperature Piezoelectric Ceramics (1-x)BiScO3-xPbTiO3 Near the Morphotropic Phase Boundary (MPB)

  • FENG Ya-Jun ,
  • XU Zhuo ,
  • LI Zhen-Rong ,
  • ZHANG Lin ,
  • YAO Xi
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  • Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, Xi’an Jiaotong University, Xi’an 710049, China

Received date: 2005-08-08

  Revised date: 2005-10-25

  Online published: 2006-09-20

Abstract

(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.

Cite this article

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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