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|Title:||Effects of processing parameter on energy storage density and ferroelectric properties of lead-free bismuth sodium titanate-strontium bismuth titanate ceramics|
|Abstract:||In order to clarify the optimal sintering conditions, the effects of processing parameter on phase evolution, physical, microstructure, dielectric, ferroelectric, and energy storage density properties of bismuth sodium titanate-strontium bismuth titanate ceramics (or BNT-SBT) were investigated. The studied ceramics were fabricated via a conventional mixed oxide method and sintered at temperatures ranging from 1100–1175 °C under normal atmosphere for 3 h dwell time with a heating/cooling rate of 5 °C/min. The XRD data revealed that the coexisting rhombohedral and tetragonal phases were observed in all of the ceramics. With increasing sintering temperature, the cubic-rich phase was dominated; and the average grain size tended to increase. For the ceramics sintered at 1150 °C, the good density (5.74 g/cm3), dielectric ("max = 3510, tan δ = 0.0501, TF-R = 73.80 °C, Tm = 273 °C), and ferroelectric (Pr = 3.05 µC/cm2, Ec = 7.69 kV/cm) were obtained. In addition, the obtimum sintering temperature of 1150 °C was also found to improve the energy storage density properties (W = 0.94 J/cm3, η = 89.93% at 125 °C, and E = Emax).|
|Appears in Collections:||CMUL: Journal Articles|
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