Enhanced energy storage properties of Bi0.5Li0.5TiO3 modified Sr0.1Bi0.45Na0.45TiO3 based ceramics

Abstract

Lead-free (1x)Sr 0.1 Bi 0.45 Na 0.45 TiO 3 xBi 0.5 Li 0.5 TiO 3 (x = 00.4) ceramics were successfully prepared by a solid-state reaction technique. The effects of amount of Bi 0.5 Li 0.5 TiO 3 on structure and electrical properties were examined. The X-ray diffraction (XRD) analysis revealed that all the investigated specimens have a perovskite structure. An obvious change in microstructure with the increase of Bi 0.5 Li 0.5 TiO 3 concentration was observed. This study demonstrated that relaxor could be stabilized in Sr 0.1 Bi 0.45 Na 0.45 TiO 3 based ceramics by lowering the tolerance factor and electronegativity difference. Besides, a dielectric anomaly related to thermal evolution of crystallographic symmetry was emerged at the depolarization temperature. Upon incorporation of 26 mol% Bi 0.5 Li 0.5 TiO 3 , the specimens were able to withstand an electric field intensity of 106.9 kV/cm with an energy density of 0.88 J/cm 3 and an energy efficiency of 65%.