High Curie temperature piezocrystals in the BiScO3-PbTiO3 perovskite system
Abstract
Perovskite ferroelectric single crystals in the (1-x)BiScO3-xPbTiO3 (BSPT) system were grown using a flux method. The Curie temperature of rhombohedral BSPT(43/57) crystals was found to be about 404 °C, with a rhombohedral-tetragonal phase transition temperature (Tr-t) around 350 °C. The coercive field (Ec) was found to be 13.7 kV/cm for <001>-oriented crystals, while the coupling factor k33 was determined to be ∼90% at room temperature and was nearly temperature independent until 330 °C. High piezoelectric properties together with a high Curie temperature and coercive field make rhombohedral BSPT crystals promising candidates for the next generation of high-performance, high-temperature actuators and transducers.
- Publication:
-
Applied Physics Letters
- Pub Date:
- October 2003
- DOI:
- 10.1063/1.1619207
- Bibcode:
- 2003ApPhL..83.3150Z
- Keywords:
-
- 77.84.Dy;
- 77.65.Bn;
- 77.80.Bh;
- 64.70.Kb;
- Niobates titanates tantalates PZT ceramics etc.;
- Piezoelectric and electrostrictive constants;
- Phase transitions and Curie point;
- Solid-solid transitions