Abstract
Lead-free Sr and Nb co-doped Bi1/2Na1/2Ti1-xNbxO3-Ba1-ySryZrO3 (BNTN-BSZ, with x, y = 0-0.030) piezoceramics were synthesized by a conventional solid-state reaction method and their crystalline phase, microstructure and electromechanical properties were explored. X-ray diffraction and scanning electron microscopy analysis show successful synthesis of BNTN-BSZ ceramics. The X-ray diffractogram reveal that Sr and Nb effectively diffused into the BNT-BZ lattice and formed a complete solid solution of BNTN-BSZ having perovskite phase and a pseudocubic symmetry. Sr and Nb doping in BNT-BZ ceramics result in degradation of the remnant polarization and coercive field. However, the field-induced strain was significantly enhanced for composition x = 0.010, giving rise to a dynamic piezoelectric constant (d33 ∗ = Smax/Emax = 466 pm/V). Furthermore, the depolarization temperature decreased and the room temperature dielectric constant was increased with increasing amount of Sr and Nb concentration.
| Original language | English |
|---|---|
| Pages (from-to) | 13688-13693 |
| Number of pages | 6 |
| Journal | Materials Today: Proceedings |
| Volume | 5 |
| Issue number | 5 |
| DOIs | |
| State | Published - 2018 |
| Externally published | Yes |
| Event | 1st International Conference on Advanced Energy Materials, AEM2 016 - 8th International Conference on Advanced Nanomaterials - Guildford, United Kingdom Duration: 12 Sep 2016 → 16 Sep 2016 |
Keywords
- Bnt
- Field-induced strain
- Lead-free ceramics
- Perovskite structure