Abstract
In order to develop new piezoelectric crystals with high T C and high performance for high-power and high-temperature applications, the Pb(Fe 1/2Nb 1/2)O 3-Pb(Yb 1/2Nb 1/2)O 3-PbTiO 3 [PFN-PYN-PT(10/38/52)] ternary piezo-/ferroelectric single crystals have been grown by the flux method for the first time. The crystal structure has been characterized by means of X-ray diffraction technique, showing a perovskite phase with rhombohedral symmetry at room temperature. The as-grown PFN-PYN-PT crystal possesses a high Curie temperature (T C) of 325 °C and a high rhombohedral-tetragonal phase transition temperature (T rt) of 155 °C. Complete electric characterization has revealed the high performance of the ternary crystals, with a dielectric constant ε′ = 1620, a piezoelectric coefficient d 33 = 1100 pC N -1, a longitudinal electromechanical coupling factor k 33 = 70%, a remnant polarization P r = 25.8 μC cm -2, a coercive field E c = 10.3 kV cm -1, and a mechanical quality factor Q m = 110 for (001)-oriented crystals at room temperature. These results show that the PFN-PYN-PT crystals are a promising candidate for uses in electromechanical transducers for high-power and high-temperature applications.
| Original language | English |
|---|---|
| Pages (from-to) | 4407-4413 |
| Number of pages | 7 |
| Journal | CrystEngComm |
| Volume | 14 |
| Issue number | 13 |
| DOIs | |
| State | Published - 7 Jul 2012 |
| Externally published | Yes |