Microstructures and energy-storage properties of (1 − x)(Na0.5Bi0.5)TiO3–xBaTiO3 with BaO–B2O3–SiO2 additions

Abstract

A series of (1 -x)(Na 0.5 Bi 0.5 )TiO 3 -xBaTiO 3 (abbreviated as NBT-xBT) (x = 0, 0.01, 0.05, 0.1, 0.15) ceramics with 3 mol% BaO-B 2 O 3 -SiO 2 glass additives were prepared via the solid state reaction route. Effect of the BaTiO 3 content on microstructures, phase evolution, dielectric, and ferroelectric and energy storage properties of NBT-xBT glass ceramics has been investigated. X-ray diffraction studies of NBT-xBT ceramics with glass of 3 mol% were a perovskite structure without the secondary phase. With increasing BaTiO 3 additive in the ceramics, the dielectric constant and the dielectric breakdown strength exhibited a gradual increase firstly and then slightly decrease. The addition of 5 mol% BaTiO 3 to the ceramics improved the dielectric constant and energy storage properties remarkably, and the maximum recoverable discharged energy density of 0.68 J/cm 3 with an energy efficiency of 71 % was obtained by the sintering at 1035°C.

Microstructures and energy storage properties of Mn-doped 0.97Bi0.47Na0.47Ba0.06TiO3–0.03K0.5Na0.5NbO3 lead-free antiferroelectric ceramics

“…Compared to the ferroelectric (FE) materials and linear dielectric materials [1,2], anti-ferroelectric (AFE) materials possess higher energy density (W), and they are more suitable for storage capacitors [3][4][5][6]. As reported, the W value of AFE ceramics ranges from 0.4 to 2.57 J/cm 3 [7][8][9], most of them are included Pb, such as PZST, PLZT, PLZ.…”