Electrical Characteristics and Microstructures of Eu2O3-Doped Bi4Ti3O12 Ceramics
The electrical properties of Eu-doped bismuth titanate,Bi4-xEuxTi3O12(BET) ceramics prepared by a conventional electroceramic technique were investigated. XRD analyses revealed Bi-layered perovskite structure in all samples. SEM micrographs showed randomly oriented and plate-like morphology. For the samples with x=0.4 and 1.0 the current-voltage characteristics exhibited negative differential resistance behaviors and their P-V hysteresis loops were characterized by large leakage current, whereas for the samples with x=0.6 and 0.8 the current-voltage characteristics showed simple ohmic behaviors and their P-E hysteresis loops were the saturated and undistorted hysteresis loops. The remanent polarization ( Pr) and coercive field (Ec) of the BST ceramic with x=0.8 were above 16μC/cm2and 70KV/cm , respectively.