Effects of MnO doping on properties of 0.97K0.5Na0.5NbO3-0.03(Bi0.5K0.5)TiO3piezoelectric ceramics

X. P. Jiang, Y. Chen, Kwok Ho Lam, S. H. Choy, J. Wang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

39 Citations (Scopus)

Abstract

MnO-doped 0.97K0.5Na0.5NbO3-0.03(Bi0.5K0.5)TiO3lead-free piezoelectric ceramics have been fabricated by solid state reaction. The MnO-doped KNN-BKT samples show tetragonal perovskite structure and the grain size increases obviously. With an addition of the optimal doping of MnO, all the electrical properties of the samples, especially the piezoelectric and pyroelectric performance, have been enhanced significantly. The KNN-BKT ceramics, with 0.8 wt% MnO doping, exhibits optimal electrical properties: d33= 221 pC/N, kp= 44.7%, tgδ = 1.4%, εr= 1229, Qm= 143, ρ = 4.464 g/cm3and p = 221 μC/m2K.
Original languageEnglish
Pages (from-to)323-326
Number of pages4
JournalJournal of Alloys and Compounds
Volume506
Issue number1
DOIs
Publication statusPublished - 10 Sep 2010

Keywords

  • Electric properties
  • Lead-free piezoelectric ceramics
  • MnO doping

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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