Structure, ferroelectric, piezoelectric, and ferromagnetic properties of BiFeO3-BaTiO3-Bi0.5Na0.5TiO3 lead-free multiferroic ceramics

Y. Li, N. Jiang, Kwok Ho Lam, Y.Q. Guo, Q.J. Zheng, Q. Li, W. Zhou, Y. Wan, D.M. Lin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

Lead-free multiferroic ceramics of BiFeO3-BaTiO3-Bi0.5Na0.5TiO3 have been prepared by a conventional ceramic technique. The microstructure, multiferroic, and piezoelectric properties of the ceramics have been studied. The ceramics sintered at 1000 degrees C for 2h possess a pure perovskite structure and a morphotropic phase boundary of rhombohedral and tetragonal phases is formed at x=0.02. After the addition of Bi0.5Na0.5TiO3, two dielectric anomalies are observed at high temperatures (T-m similar to 510 degrees C-570 degrees C and T(2 similar to)720 degrees C). The phase transition around T-m becomes wider gradually with increasing x. The ferroelectricity, piezoelectricity, and ferromagnetism of the ceramics are significantly improved after the addition of Bi0.5Na0.5TiO3. High resistivity (similar to 1.3x10(9)cm), strong ferroelectricity (P-r=27.4C/cm(2)), good piezoelectricity (d(33)=140pC/N, k(p)=31.4%), and weak magnetic properties (M-r=0.19emu/g) are observed.
Original languageEnglish
Pages (from-to)3602-3608
Number of pages7
JournalJournal of the American Ceramic Society
Volume97
Issue number11
DOIs
Publication statusPublished - 2014

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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