Electrical properties of (K0.5Na0.5)1-xAgxNbO3lead-free piezoelectric ceramics

Chenggang Xu, Dunmin Lin, Kin Wing Kwok

Research output: Journal article publicationJournal articleAcademic researchpeer-review

13 Citations (Scopus)

Abstract

(K0.5Na0.5)1-xAgxNbO3lead-free piezoelectric ceramics have been fabricated by an ordinary ceramic technique. The results of XRD reveal that Ag+diffuses into the K0.5Na0.5NbO3lattices to form a new solid solution with an orthorhombic perovskite structure and the solubility of Ag+into A-sites of K0.5Na0.5NbO3is about 0.20. The ceramics can be well-sintered at 1,100-1,110 °C. The partial substitution of Ag+for A-site ion (K0.5Na0.5)+decreases slightly both paraelectric cubic-ferroelectric tetragonal (TC) and ferroelectric tetragonal-ferroelectric orthorhombic phase transition temperatures (TO-T). The ferroelectricity of the ceramics becomes weak at high Ag+concentration. The ceramic with x = 0.10 possesses optimum electrical properties: d33= 135pC/N, kP= 0.43, kt= 0.46, εr= 470, tanδ = 3.39%, and TC= 394°C.
Original languageEnglish
Pages (from-to)1054-1057
Number of pages4
JournalJournal of Materials Science: Materials in Electronics
Volume19
Issue number11
DOIs
Publication statusPublished - 1 Jan 2008

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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