Structure and piezoelectric properties of (Bi0.5Na0.5)1-x-y-zBax(Bi0.5Li0.5)ySrzTiO3lead-free ceramics

Dunmin Lin, Kin Wing Kwok

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)

Abstract

Lead-free (Bi0.5Na0.5)1-x-y-zBax(Bi0.5Li0.5)ySrzTiO3ceramics were prepared by an ordinary sintering method and their structure and piezoelectric properties have been studied. X-ray diffraction patterns show that Ba2+, Li+and Sr2+diffuse into the Bi0.5Na0.5TiO3lattices to form a solid solution with a pure perovskite structure and a morphotropic phase boundary (MPB) between rhombohedral and tetragonal phases is formed at 0.04 ≤ x ≤ 0.08 and z < 0.06. The content of Li+has no obvious influence on the crystal structure of the ceramics. The ceramics situated within the MPB exhibit a lower coercive field Ecand a larger remanent polarization Pr. Because of the formation of the MPB, lower Ecand larger Pr, the ceramics with x = 0.06, y = 0.075 - 0.125 and z = 0-0.02 possess improved piezoelectric properties. The optimum d33(235 pC/N) and kp(36.3%) are reached at x/y/z = 0.06/0.125/0.02 and 0.06/0.075/0.02, respectively. The deformed PE loop is also observed near or above Td.
Original languageEnglish
Pages (from-to)49-53
Number of pages5
JournalFunctional Materials Letters
Volume3
Issue number1
DOIs
Publication statusPublished - 1 Mar 2010

Keywords

  • Bi Na TiO 0.5 0.5 3
  • dielectric properties
  • Lead-free
  • piezoelectric properties

ASJC Scopus subject areas

  • Materials Science(all)

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