Preparation and Electrical Characteristics of Bi_4-xYb_xTi₃O₁₂ Ceramics

Abstract:

The electrical properties of Yb-doped bismuth titanate,Bi_4-xYb_xTi₃O₁₂ (BYbT) 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=0.25 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=0.5 and 0.75 the current-voltage characteristics showed simple ohmic behaviors and their P-E hysteresis loops were the saturated and undistorted hysteresis loops. The remanent polarization ( P_r ) and coercive field (E_c) of the BYbT ceramic with x=0.75 were above 16μC/cm² and 75KV/cm , respectively.

• Periodical: Key Engineering Materials (Volume 591)
• Pages: 212-215
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.591.212
• Online since: November 2013
• Authors: Chong Qing Huang, J. Liu, M. Chen, X.A. Mei
• Keywords: Bismuth Titanate, Doping, Ferroelectric, Film

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