Structure and piezoelectric properties of new ternary K0.5Na0.5NbO3-LiSbO3-CaTiO3lead-free piezoceramics

Qiaoji Zheng, Dunmin Lin, Xiaochun Wu, Chenggang Xu, Chun Yang, Kin Wing Kwok

Research output: Journal article publicationJournal articleAcademic researchpeer-review

6 Citations (Scopus)

Abstract

New ternary (1-x)K0.5Na0.5NbO3-x(0.80LiS- bO3-0.20CaTiO3) lead-free ceramics were fabricated by a conventional ceramic technique and their structure and piezoelectric properties were studied. The results of X-ray diffraction reveal that LiSbO3and CaTiO3diffuse into the K0.5Na0.5NbO3lattices to form a new solid solution with a perovskite structure. After the addition of LiSbO3and CaTiO3, the cubic-tetragonal and tetragonal-orthorhombic phase transitions shift to lower temperatures. Coexistence of the orthorhombic and tetragonal phases is hence formed in the ceramics with 0.03 < × < 0.07 at room temperature, leading to a significant enhancement of the piezoelectric properties. For the ceramics with × = 0.04-0.06, the piezoelectric properties become optimum: d33= 172-253 pC/N, kP= 49.9-55.5%, kt= 49.2-52.1% and TC= 348-373 °C. The ceramic with × = 0.04 also exhibits a good thermal stability of piezoelectric properties.
Original languageEnglish
Pages (from-to)625-629
Number of pages5
JournalJournal of Materials Science: Materials in Electronics
Volume21
Issue number6
DOIs
Publication statusPublished - 1 Jun 2010

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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