Impedance, modulus and conductivity studies of Fe3+ doped BaTiO3 ceramics prepared by solid state method
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Fe3+ doped BaTiO3 (BaTi1 − xFexO3) with x = 0.0, 0.2, 0.4 and 0.6 of Fe3+ contents was synthesized using the solid–state reaction method. The powders were calcinated at 1100 °C and sintered at 1200 °C for 6 h. The evolution of structural properties of the synthesized Fe3+-doped BaTiO3 particles was analyzed. X-ray diffraction patterns spectra revealed that the crystal phase of the obtained particles was predominately tetragonal BaTiO3 at x = 0.2. While at 0.4 and 0.6 of Fe content the hexagonal phase was formed. The correlation between densification, microstructure, and electrical properties of BaTi1 − xFexO3 (BTF) ceramics prepared was studied. The Complex impedance and modulus Cole–Cole plots showed negative temperature coefficient of resistivity behavior of the BTF materials, positive temperature coefficient of resistivity behavior for pure BT and decrease in grain boundaries resistivity. The relaxation behavior in the test materials is found to be of non-Debye type.
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