Current-Voltage and Ferroelectric Characteristics of Er₂O₃-Doped Bi₄Ti₃O₁₂ Ceramics

Abstract:

The electrical properties of Er₂O₃-doped bismuth titanate，Bi_4-xEr_xTi₃O₁₂ (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-E 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 BET ceramic with x=0.8 were above 20μC/cm² and 65KV/cm , respectively.

• Periodical: Advanced Materials Research (Volume 624)
• Pages: 162-165
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.624.162
• Online since: December 2012
• Authors: C.Q. Huang, X.B. Liu, X.A. Mei, J. Liu
• Keywords: Bismuth Titanate, Doping, Ferroelectric, Film

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