Journal of Advanced Dielectrics · 2012 · 32 citations · 26 references
Natural SciencesMaterials EngineeringMaterials ScienceCeramic MaterialsCeramicsMaterials CharacterizationDielectricsElectrical Properties Of CeramicsFerroelectric CeramicsFerroelectric MaterialsInorganic MaterialsPerovskite MaterialsBarium TitanateCeramic DielectricsDielectric ConstantImpedance AnalysisImpedance MeasurementPerovskite Crystal StructurePhase Transition TemperatureTemperature Dependence Of Electrical Properties
In this paper, we present impedance spectroscopy of Sodium Bismuth Titanate-based materials belonging to (1-x) Na 1/2 Bi 1/2 TiO 3-x BaTiO 3 (x = 0.04) (NBT–BT) system. NBT–BT ceramics are prepared by high temperature solid-state reaction method. X-ray diffraction technique showed single-phase polycrystalline sample with an ABO 3 perovskite structure. Dielectric behavior and the impedance relaxation were investigated in a wide range of temperature (room temperature (RT) –500°C) and frequency (1 kHz–1 MHz). A broad dielectric constant peak was observed over a wide temperature range around the phase transition temperature. The complex impedance plot exhibited one impedance semicircle identified over the frequency range of 1 kHz–1 MHz, which is explained by the grain effect of the bulk. The centers of the impedance semicircles lie below the real axis, which indicates that the impedance response is a Cole–Cole type relaxation.
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Yasuyoshi Saito, Hisaaki Takao, Toshihiko Tani et al. · Nature · 2004 · 5.5K citations