Large electrostrictive effect and energy storage density in MnCO3 modified Na0.325Bi0.395Sr0.245 square 0.035TiO3 lead-free ceramics

摘要

The Na0.325Bi0.395Sr0.245 square 0.035TiO3 + x MnCO3 (NBST-100xMn) lead-free ceramic samples had been fabricated by solid-state reaction method. Microstructure and electrical properties with the addition of MnCO3 had been studied in detail. The NBST-4Mn showed a low hysteresis behavior with the maximum electrostrictive coefficient (Q) of 0.0294 m(4)/C-2 and the recoverable energy storage density (W-rec) of 1.3 J/cm(3) at 95 kV/cm. In addition, the electrostrictive effect and energy storage ability presented outstanding temperature stability and fatigue resistance, which indicated a promising lead-free ceramic for high precise actuator.