Enhanced piezoelectric response and thermal stability in (1-x - y)(Na1/2Bi1/2)TiO3-y(K1/2Bi1/2)TiO3-xBaTiO(3) ternary ferroelectric single crystals

摘要

The dielectric, ferroelectric and impedance properties of (1 - x - y)NBT-yKBT-xBT single crystals were investigated systematically. Our results demonstrate that the addition of KBT leads to enhanced piezoelectric response, thermal stability (e.g., depolarization temperature, T-d). The composition and temperature induced phase transformation mechanisms were characterized by using in-situ Raman spectra. The structure nature of improved electrical performance in (1 - x - y)NBT-yKBT-xBT ternary single crystals were discussed in detail. (C) 2015 Elsevier Ltd. All rights reserved.