Abstract
This letter provides a comparative description of the properties of textured and randomly oriented poly-crystalline lead-free piezoelectric 0.93(Na 0.5Bi 0.5TiO 3)-0.07BaTiO 3 (NBT-BT) ceramics. A high longitudinal piezoelectric constant of (d 33) ∼ 322 pC/N was obtained in (001) PC textured NBT-7BT ceramics, which is almost ∼2× times the d 33 coefficient reported for randomly oriented ceramics of the same composition. In situ neutron diffraction experiments revealed that characteristically different structural responses are induced in textured and randomly oriented NBT-BT ceramics upon application of electric fields (E), which are likely related to the varying coherence lengths of polar nanoregions and internal stresses induced by domain switching.
| Original language | English (US) |
|---|---|
| Article number | 172906 |
| Journal | Applied Physics Letters |
| Volume | 100 |
| Issue number | 17 |
| DOIs | |
| State | Published - Apr 23 2012 |
| Externally published | Yes |
Bibliographical note
Funding Information:The authors gratefully acknowledge the financial support from Office of Basic Sciences, Department of Energy, and National Science Foundation. The neutron scattering measurements were carried out at the Spallation Neutron Source, which is operated with the support from the Division of Scientific User Facilities, Office of Basic Energy Sciences, US Department of Energy, under contract DE-AC05-00OR22725 with UT-Battelle, LLC. A.P. acknowledges the support from a Laboratory Directed Research and Development Fund of Oak Ridge National Laboratory.