We investigate the electrical properties of Sm-doped Bi4-xSmx Ti3O12 (BST) ceramics prepared by a conventional electroceramic technique. The x-ray diffraction analysis reveals the Bi-layered perovskite structure in all samples. The SEM micrographs show randomly oriented and plate-like morphology. For the samples with x=0.4 and 1.0, the current-voltage characteristics exhibit negative differential resistance behaviour and the P-V hysteresis loops are characterized by large leakage current, whereas for the samples with x=0.6 and 0.8, the current-voltage characteristics show simple ohmic behaviour and the P-V hysteresis loops are of the saturated and undistorted hysteresis. The remanent polarization and coercive field of the BST ceramic with x=0.8 are above 32μC/cm^2 and 70 kV/cm, respectively.
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机译：Espectroscopiadeconstacânciaemicroestrutura devitrocerâmicasLi1+ x [al xGe2-x（pO4）3]coníonslítioImpedancespectroscopy and microstructure of lithium conductor Li1 + x [al xGe2-x（pO4）3] glass ceramics
