Abstract
Abstract Lead-free (1−x)Sr0.1Bi0.45Na0.45TiO3−xBi0.5Li0.5TiO3 (x = 0−0.4) ceramics were successfully prepared by a solid-state reaction technique. The effects of amount of Bi0.5Li0.5TiO3 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 Bi0.5Li0.5TiO3 concentration was observed. This study demonstrated that relaxor could be stabilized in Sr0.1Bi0.45Na0.45TiO3 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% Bi0.5Li0.5TiO3, the specimens were able to withstand an electric field intensity of 106.9 kV/cm with an energy density of 0.88 J/cm3 and an energy efficiency of 65%.
Highlights
In response to the current environmental regulations against the use of lead in daily electronic devices, ceramics with a perovskite structure have been of great interest to the community
Binary and ternary system relaxor ceramics have been investigated for their high energy storage application, e.g., BNT–BaTiO3 [3], BNT–BaTiO3– K0.5Na0.5NbO3 [4,5,6], BNT–BaTiO3–NaNO3 [7], BNT– CaTiO3 [8], BNT–SrTiO3–BaTiO3 [9], BNT– K0.5Bi0.5TiO3–BaTiO3 [10], etc
The energy storage properties of SBNT–xBLT (0 ≤ x ≤ 40 mol%) ceramics are demonstrated in detail
Summary
In response to the current environmental regulations against the use of lead in daily electronic devices, ceramics with a perovskite structure have been of great interest to the community. Bi0.5Na0.5TiO3 (BNT) is considered as one of the most competitive alternatives for lead based ceramics. The discharged energy density (Jd) of BNT based ceramics www.springer.com/journal/40145. J Adv Ceram 2016, 5(3): 219–224 is ranged from 0.6 to 0.9 J/cm if no glass phase is added. Among these systems, Sr0.1Bi0.45Na0.45TiO3 (SBNT) has attracted much attention due to its strong dispersion of the permittivity with a relaxor-like behavior [11,12,13]. In this paper, (1 x)Sr0.1Bi0.45Na0.45TiO3–xBi0.5Li0.5TiO3 (SBNT–xBLT) are selected as lead-free energy storage materials and investigated for the dependence of structure and electrical properties on composition (x). The energy storage properties of SBNT–xBLT (0 ≤ x ≤ 40 mol%) ceramics are demonstrated in detail
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