Microstructure, density, and dielectric properties of lead-free (K 0.44Na0.52Li0.04)(Nb0.96-xTa xSb0.04)O3 piezoelectric ceramics

Yunfei Chang, Zupei Yang, Lingling Wei

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Abstract

Lead-free (K0.44Na0.52Li0.04) (Nb0.96-xTaxSb0.04)O3 piezoelectric ceramics were prepared by the conventional solid-state sintering method. The grain growth of the ceramics was inhibited and the relative density was improved with Ta substituting for Nb. Increasing x led to different variations of dielectric properties before and after poling, and prevented the occurrence of orthorhombic-tetragonal phase transition (at To-t). All the ceramics show an intermediate relaxor-like behavior between normal and ideal relaxor ferroelectrics. Significantly enhanced dielectric and piezoelectric properties were obtained in the ceramics with x=0.20. The ceramics are very promising lead-free materials for electromechanical device applications.

Original languageEnglish (US)
Pages (from-to)1656-1658
Number of pages3
JournalJournal of the American Ceramic Society
Volume90
Issue number5
DOIs
Publication statusPublished - May 1 2007

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All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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