Grain size effect on electrical properties of Mn-modified 0.67BiFeO3-0.33BaTiO3 lead-free piezoelectric ceramics

研究成果: Article査読

21 被引用数 (Scopus)

抄録

To investigate how grain size affects the dielectric, ferroelectric, and piezoelectric properties of Mn-modified 0.67BiFeO3-0.33BaTiO3 ceramics, we prepared samples with a wide variety of grain sizes from 4.1 μm to 0.59 μm via a conventional solid-state process that use the normal and the two-step sintering methods. Small-signal dielectric measurements show that all the samples exhibit a relaxor-like behavior and that grain size has little influence on the room-temperature dielectric permittivity. For grain sizes below 2 μm, the remanent polarization Pr and piezoelectric coefficient d33 decrease with the grain size, whereas they remain almost constant near Pr = 27 μC/cm2 and d33 = 70 pC/N in samples with grain sizes exceeding 2 μm. The mechanism underlying the observed grain size effect is discussed in terms of the electric-field-induced formation of macroscopic ferroelectric domains.

本文言語English
ページ(範囲)8206-8211
ページ数6
ジャーナルCeramics International
42
7
DOI
出版ステータスPublished - 2016 5 15

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • セラミックおよび複合材料
  • プロセス化学およびプロセス工学
  • 表面、皮膜および薄膜
  • 材料化学

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