Novel perovskite ferroelectric (1-x)BiScO3-xPbTiO3 single crystals with tetragonal phase were successfully grown by a conventional high-temperature solution method using a Pb3O4 and Bi2O3 flux. The typical crystal size was 2-15 mm with rectangular shape and green/blue color. The dielectric constant (K) at room temperature was determined to be 400-550, decreasing to about 300 after the poling process. The Curie temperature of 0.43BiScO3-0.66PbTiO3 single crystals was found to be about 460°C, similar to the polycrystalline data. The remanent polarization (P(r)) was 28 μC/cm2 with a coercive field (E(c)) of 34 kV/cm. The piezoelectric coefficient d33 was about 200 pC/N for 〈0 0 1〉-oriented tetragonal crystals. The longitudinal electromechanical coupling coefficient k33 was ∼ 73% with a lateral mode coupling coefficient k31 of ∼ -35.8% and a thickness mode coupling k(t) of 60-64%.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Inorganic Chemistry
- Materials Chemistry