Abstract
The structure and dielectric properties of (1-x)Bi(In 0.20 Ga 0.05 Sc 0.75 )O 3 −xPbTiO 3 (x = 0.55∼ 0.70) ceramics (BIGS-PT) have been investigated. BIGS-PT ceramics show good piezoelectric and ferroelectric properties: d 33 = 295 pC/N, k P = 43.0%, P r = 19.2 C/cm2, and E c = 34.9 kV/mm, respectively. The temperature dependence of dielectric constant of BIGS-PT reveals that the Curie temperature T c increases with increasing of PbTiO3 content. The higher dielectric strength means that BIGS-PT is a promising high power electromechanical material.
Acknowledgment
This work was supported by Natural Science Foundation of China (NSFC) (60471044) and Specialized Research Fund for the Doctoral Program of High Education of China (SRFDP) (20020610014).