0.75(Bi1/2Na1/2)TiO3 -0.20(Bi 1/2K1/2)TiO3-0.05BaTiO3 lead-free ceramics with addition of CeO2

S. H. Choy, X. X. Wang, H. L.W. Chan, C. L. Choy

Research output: Journal article publicationJournal articleAcademic researchpeer-review

10 Citations (Scopus)

Abstract

Lead-free piezoelectric 0.75(Bi 1/2 Na 1/2 )TiO 3 -0.20(Bi 1/2 K 1/2 )TiO 3 -0.05BaTiO 3 ceramics(abbreviated as BNKBT-20) with addition of 0.2, 0.4, 0.6 and 0.8 wt% of CeO 2 , respectively, were prepared by a conventional mixed oxide method. The addition of CeO 2 can reduce the dissipation factor and enhance the mechanical quality factor significantly. The composition with 0.4 wt% CeO 2 has a piezoelectric d 33 constant of 129 × 10 - 12 C/N and a relatively low dissipation factor (tan δ = 1.8%) at 1 kHz which shows a 50% reduction in the dissipation factor when compared with BNKBT-20 before doping (tan δ = 3.74%).

Original languageEnglish
Pages (from-to)69-79
Number of pages11
JournalFerroelectrics
Volume336
DOIs
Publication statusPublished - 1 Jul 2006

Keywords

  • Bismuth sodium titanate
  • Depolarization temperature
  • Lead-free ceramics
  • Piezoelectricity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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