The Effect of Ga³⁺ Substituting Sc³⁺ on Properties of BiScO₃-PbTiO₃ Ceramics

Abstract

0.36(BiSc_(1-x)Ga _x O₃)-0.64PbTiO₃(BGSPT64-x, x = 0.001, 0.003, 0.005, 0.008, 0.01, 0.015, 0.02) solid solutions were prepared by conventional solid state reaction method. The results of x-ray diffractions revealed that the introduction of the Ga didn't change the perovskite structure of the solid solutions. The dielectric and piezoelectric properties were investigated. The results showed that BGSPT64-0.01 had an optimized characterization and its piezoelectric coefficient d ₃₃, planar coupling coefficient k _p, remnant polarization p _r and the coercive field E_c are 510 pC/N, 61%, 49μC/cm² and 2.1kv/mm, respectively. The BGSPT64-0.01 ceramics will be a good candidate material for the high temperature piezoelectric actuator and transducers.

Keywords:

• Ga-modified
• high Curie temperature
• piezoelectric ceramics

Acknowledgments

This work was financially supported by the National Basic Research Program of China under Grant No 2009CB623306, the National Nature Science foundation of China under Grant No. 60528008, and the Key Science and Technology Research Project from the Ministry of Education of China under Grant No.108180.