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/cm2 and 70KV/cm , respectively.
Yiwang Bao, Danyu Jiang, Li Tian and Jianghong Gong
M. Chen et al., "Electrical Characteristics and Microstructures of Eu2O3-Doped Bi4Ti3O12 Ceramics", Key Engineering Materials, Vol. 492, pp. 210-213, 2012