Preparation and Characterization of yBiGaO3-(1-x-y)BiScO3-xPbTiO3 Piezoelectric Ceramics

-The ternary system of yBiGaO
₃
-(1-x-y) BiScO
₃
-xPbTiO
₃
(BGS-PT) ceramics was prepared by using conventional mixing oxide process. X-ray diffraction analysis reveals that BGS-PT ceramics show the perovskite structure. The Curie temperature of BGS-PT ceramics was found to be increased with increasing of BiGaO
₃
content. However, more BiGaO
₃
content would lead to sharply decreased piezoelectric properties of BGS-PT ceramics and the secondary phase would be formed in BGS-PT system. BGS-PT ceramics with x, y=0.56, 0.19 shows a high Curie temperature T
_c
and large piezoelectric constant d
₃₃
of 501degC and 152 pC/N, respectively. The high-T
_c
of BGS-PT ceramics with the useable piezoelectric properties suggested those future high-temperature applications.