Ferroelectric Properties and Microstructures of Dy₂O₃-Doped Bi₄Ti₃O₁₂ Ceramics

Abstract:

The electrical properties of Dy-doped bismuth titanate, Bi_4-xDy_xTi₃O₁₂ (BDT) ceramics prepared by a conventional electroceramic technique have been investigated. XRD analyses revealed Bi-layered perovskite structure in all samples, and indicted that Bi ions were only substituted near the Ti-O octahedron layers by Dy ions. SEM micrographs show randomly oriented and plate-like morphology. The remanent polarization (P_r) and coercive field (E_c) of the BDT ceramic with x = 0.75 were above 19μC/cm² and 50KV/cm, respectively. The large value of remanent polarization and low coercive field of Dy-doped bismuth titanate ceramics promote these materials to potential applications.

• Periodical: Key Engineering Materials (Volume 492)
• Pages: 226-229
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.492.226
• Online since: September 2011
• Authors: J. Liu, M. Chen, X.A. Mei, Y.H. Sun, Chong Qing Huang
• Keywords: Dielectric, Ferroelectric, Microstructure

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