Abstract
The (1-x)BiFe0.91(Mn0.47Ti0.53)0.09O3–xBaTiO3 (BFMT–BT) lead-free ceramics have been fabricated by the conventional solid-state reaction method. The phase structure of BFMT-BT investigated by X–ray diffraction shows a single perovskite phase. Although 20% mol of Bi2O3 was added to the raw materials, the evaporation of Bi3+ ions during calcining and sintering processes is from 20 to 30% wt. relative to other elements. The effect of BaTiO3content on electrical properties of BFMT-BT ceramic has been investigated. At BaTiO3concentration of 0.3 mol and the sintering temperature of 950oC, electrical properties of ceramics are best with the density (r) of 7.6 g/cm3, the electromechanical coupling factor (kp) of 0.28, the dielectric constant (εr) of 1028, and the difference in polarizations at zero field is about 10.5 mC/cm2.
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