Microstructure and piezoelectric properties of CuO-doped 0.95(K0.5Na0.5)NbO3-0.05Li(Nb0.5Sb0.5)O3 lead-free ceramics

Yongjie Zhao*, Yuzhen Zhao*, Rongxia Huang, Rongzheng Liu, Heping Zhou

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)

Abstract

The effects of sintering temperature and the addition of CuO on the microstructure and piezoelectric properties of 0.95(K0.5Na0.5)NbO3-0.05Li(Nb0.5Sb0.5)O3 were investigated. The KNN-5LNS ceramics doped with CuO were well sintered even at 940°C. A small amount of Cu2+ was incorporated into the KNN-5LNS matrix ceramics and XRD patterns suggested that the Cu2+ ion could enter the A or B site of the perovskite unit cell and replace the Nb5+ or Li+ simultaneously. The study also showed that the introduction of CuO effectively reduced the sintering temperature and improved the electrical properties of KNN-5LNS. The high piezoelectric properties of d33=263pC/N, kp=0.42, Qm=143 and tanδ=0.024 were obtained from the 0.4mol% CuO doped KNN-5LNS ceramics sintered at 980°C for 2h.

Original languageEnglish
Pages (from-to)1939-1944
Number of pages6
JournalJournal of the European Ceramic Society
Volume31
Issue number11
DOIs
Publication statusPublished - 1 Oct 2011
Externally publishedYes

Keywords

  • CuO addition
  • KNN
  • Lead-free
  • Low temperature sintering
  • Piezoelectric properties

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