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(Color online) XRD patterns of (a) the calcined BT-0.3BNT and (b) the sintered BT-0.3BNT. The inset shows the lattice parameters of as a function of the BNT content.
(Color online) Temperature dependence of resistivity of the pure BT (inset) and ceramics.
(Color online) Temperature dependence of dielectric properties of the pure BT and ceramics. The inset shows the enlarged figure of dielectric loss tangent of the pure BT ceramic.
(Color online) Typical impedance spectra of the pure BT and ceramics at . The insets show the temperature dependence of resistivities of the grain interiors , grain shells , and grain boundaries determined from the fitting semicircles.
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