Abstract
ABSTRACTPolycrystalline (1-x)BT-xBFN ceramics (x = 0, 0.02, 0.04, 0.06, 0.08) were synthesized in single perovskite phase by solid state reaction route. 1100°C/4 hours and 1250°C/4 hours were optimized as the calcination and sintering temperatures, respectively. XRD study revealed the absence of any secondary phase peaks with tetragonal structure in all the studied ceramics. Grain size initially decreased and then increased with the increase of BFN content. Maximum value of dielectric constant (3980) at room temperature with low temperature coefficient of capacitance (from RT to 70°C) was obtained in x = 0.06 ceramics. Polarization vs. electric field (P-E) study confirmed the ferroelectric nature of the studied ceramics.
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