Morphotropic phase boundary study of the BNT-BKT lead-free piezoelectric ceramics

Wei Zhao, Heping Zhou, Yongke Yan, Dan Liu

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A lead-free piezoelectric ceramic binary system based on bismuth sodium titanate (Bi0.5Na0.5)TiO3 (BNT)-bismuth potassium titanate (Bi0.5K0.5)TiO3 (BKT) was synthesized by conventional mixed-oxide technique. The XRD analysis showed that the rhombohedral-tetragonal morphotropic phase boundary (MPB) of the Bi 0.5 (Na1-xKx)0.5 TiO3 system was in the composition range of x = 0.16 - 0.20. In addition, the piezoelectric properties of this system were also investigated. It was indicated that the piezoelectric properties are better with the compositions near the rhombohedral phase within the MPB than the compositions near the tetragonal phase.

Original languageEnglish (US)
Pages (from-to)1908-1910
Number of pages3
JournalKey Engineering Materials
Volume368-372 PART 2
StatePublished - 2008

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering


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