Materials Design and Characterization of (Bi_1/2Na_1/2)TiO₃-Bi(B’,B”)O₃ Ceramics

Abstract:

0.995(Bi1/2Na1/2)TiO3-0.005Bi(B’,B”)O3 solid-solution ceramics (B’,B” denote Zn, Mg, Ni, Ti, Nb) were fabricated and their ferroelectric properties were investigated. Based on the structural characteristics of Bi(B’,B”)O3 analyzed by first-principles calculations, a materials design for obtaining a large piezoelectric strain is proposed: an index Z= Ps∙(ε33*∙s33)1/2, where Ps is spontaneous polarization, ε33* is relative permittivity and s33 is elastic compliance. A positive correlation was observed between Z and effective piezoelectric constant d33* observed for strain measurements.

• Periodical: Key Engineering Materials (Volume 445)
• Pages: 59-62
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.445.59
• Online since: July 2010
• Authors: Yumiko Oshima, Yuuki Kitanaka, Yuji Noguchi, Masaru Miyayama
• Keywords: Bismuth Sodium Titanate (BNT), Ceramic, Ferroelectric, First-Principle Calculations

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