Effect of Li-substitution on piezoelectric and ferroelectric properties of (Bi0.92Na0.92-xLix)0.5Ba0.06Sr0.02TiO3lead-free ceramics

Dunmin Lin, Kin Wing Kwok

Research output: Journal article publicationJournal articleAcademic researchpeer-review

14 Citations (Scopus)

Abstract

New lead-free ceramics (Bi0.92Na0.92-xLix)0.5Ba0.06Sr0.02TiO3have been fabricated by a conventional ceramic technique and their electrical properties have been studied. X-ray diffraction studies reveal that Li+, Ba2+and Sr2+diffuse into the Bi0.5Na0.5TiO3lattices to form a new solid solution with a pure perovskite structure. The partial substitution of Li+for Na+increases the remanent polarization Prof the ceramics. Because of the large Prand low coercive field Ec, the ceramics with x = 0.075-0.125 exhibit excellent piezoelectric properties: d33= 189-235 pC/N, kp= 33.6-36.3% and kt= 51.6-54.3%. The ceramics exhibit relaxor behaviors after the substitution of Li+for Na+. Our results also suggest that polar and non-polar phases may coexist in the ceramics at temperatures above the depolarization temperature Td.
Original languageEnglish
Pages (from-to)1196-1202
Number of pages7
JournalCurrent Applied Physics
Volume10
Issue number4
DOIs
Publication statusPublished - 1 Jul 2010

Keywords

  • Bi Na TiO 0.5 0.5 3
  • Ferroelectric
  • Lead-free
  • Piezoelectric

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)

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