Effect of CuO on dielectric and piezoelectric properties of (K 0.4425Na 0.52Li 0.0375)(Nb 0.87Ta 0.06Sb 0.07)O 3 ceramics

Bin Shao, Jin Hao Qiu, Kong Jun Zhu, Yang Cao, Hong Li Ji

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

In this paper, the effects of CuO addition on microstructure and electrical properties of (K 0.4425Na 0.52Li 0.0375)(Nb 0.87Ta 0.06Sb 0.07)O 3 (abbreviated as KNLNST) ceramics were studied to develop KNLNST with high mechanical quality factor Q m and low dielectric loss tan δ. The results of this work suggest that both "hard" and "soft" effects were observed due to CuO addition, which enhanced the Q m and planar mode electromechanical coupling factors k p, and reduced the piezoelectric coefficient d 33, coercive field E c, dielectric constant ε r and tan δ. High dielectric and piezoelectric properties of ε r = 1304, d 33 = 241 pC/N, k p = 0.437 and Q m = 138 were obtained for the specimens containing 1 mol% CuO. Particularly, tan δ at 1 kHz can be reduced from 0.038 for KNLNST ceramics to 0.0087 for 1 mol% CuO-added KNLNST ceramics.

Original languageEnglish
Pages (from-to)128-133
Number of pages6
JournalJournal of Alloys and Compounds
Volume515
DOIs
Publication statusPublished - 2012 Feb 25
Externally publishedYes

Keywords

  • Ceramics
  • Electronic properties
  • Microstructure
  • Piezoelectricity

ASJC Scopus subject areas

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

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