Effects of CuO addition on electrical properties of 0.6BiFeO3-0.4(Bi0.5K0.5)TiO3 lead-free piezoelectric ceramics

研究成果: Article査読

24 被引用数 (Scopus)


0.6BiFeO3-0.4(Bi0.5K0.5)TiO3 (0.6BF-0.4BKT) ceramic samples with 0.0-4.0 mol% CuO were prepared by the solid-state reaction. The CuO addition aided the densification of the samples and slightly increased the lattice constant. The relaxor-like defuse dielectric peak of 0.6BF-0.4BKT became sharper with increasing the CuO content. Polarization-electric field curve of the undoped 0.6BF-0.4BKT was a pinched loop in the as-sintered state, while that was a square hysteresis with a large remanent polarization of 48 μC/cm2 after the thermal quenching, demonstrating a strong domain wall pinning due to defect dipoles. We found that the CuO addition up to 2.0 mol% facilitates the polarization switching in the as-sintered samples to increase the remanent polarization and the piezoelectric d33 coefficient. The results of the structural and electrical investigations suggested that the copper ion acts as a donor in 0.6BF-0.4BKT by compensating the potassium vacancy created by the evaporation of K2O during the calcination and sintering processes.

ジャーナルJournal of the American Ceramic Society
出版ステータスPublished - 2014 12 3

ASJC Scopus subject areas

  • セラミックおよび複合材料
  • 材料化学


「Effects of CuO addition on electrical properties of 0.6BiFeO<sub>3</sub>-0.4(Bi<sub>0.5</sub>K<sub>0.5</sub>)TiO<sub>3</sub> lead-free piezoelectric ceramics」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。