Ferroelectric Properties and Microstructures of La2O3-Doped Bi4Ti3O12 Ceramics

Chong Qing Huang; Min Chen; X.A. Mei; Y.H. Sun; J. Liu

doi:10.4028/www.scientific.net/AMR.412.302

Paper Titles

Structure and Piezoelectric Properties of (K,Na)NbO₃ Ceramics Fabricated from Microwave Hydrothermal Synthesized Powders
p.285

Effect of Low-Temperature Frit on the Sintering Behavior and Properties of 0.95K_0.49Na_0.51NbO₃-0.05LiSbO₃ Lead-Free Piezoceramics
p.290

Electrical Characteristics and Microstructures of Eu₂O₃-Doped Bi₄Ti₃O₁₂ Thin Films
p.294

Electrical Characteristics and Microstructures of Ce₂O₃-Doped Bi₄Ti₃O₁₂ Ceramics
p.298

Ferroelectric Properties and Microstructures of La₂O₃-Doped Bi₄Ti₃O₁₂ Ceramics
p.302

Ferroelectric Properties of Bismuth Titanate Ceramics by Dy³⁺/V⁵⁺ Substitution
p.306

Ferroelectric Properties of Bi_3.25La_0.75Ti_2.97V_0.03O₁₂
p.310

Electrical Characteristics and Microstructures of Gd-Doped Bi₄Ti₃O₁₂ Ceramics
p.314

Electrical Characterization and Microstructures of La-Doped Bi₄Ti₃O₁₂ Thin Films
p.318

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Ferroelectric Properties and Microstructures of La₂O₃-Doped Bi₄Ti₃O₁₂ Ceramics

Abstract:

The electrical properties of La-doped bismuth titanate, Bi_4-xLa_xTi₃O₁₂ (BLT) 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 La ions. SEM micrographs show randomly oriented and plate-like morphology. The remanent polarization ( P_r ) and coercive field ( E_c) of the BLT ceramic with x=0.75 were above 19μC/cm² and 60KV/cm, respectively. The large value of remanent polarization and low coercive field of La-doped bismuth titanate ceramics promote these materials to potential applications.