Effect of sintering temperature on the piezoelectric and ferroelectric characteristics of CuO doped 0.95(Na0.5K0.5)NbO3-0.05LiTaO3 ceramics

Ming Ru Yang, Cheng Shong Hong, Cheng Che Tsai, Sheng Yuan Chu

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29 Citations (Scopus)

Abstract

In this paper, lead-free (Na0.5K0.5)NbO3 ceramics doped with 5 mol% LiTaO3 and 2 mol% CuO were prepared using the conventional mixed-oxide method. The samples were characterized by X-ray diffraction analysis, scanning electron microscopy, and atomic force microscopy measurements. The effect of sintering temperature on the bulk density, piezoelectric and ferroelectric properties was investigated. The results show that an increase of CuO very effectively lowers the sintering temperature and improves the electric properties of (Na0.5K0.5)NbO3-LiTaO3 ceramics. High piezoelectric properties of kp = 37.8%, kt = 50.7%, and k33 = 58.9% and ferroelectric properties Ec = 34.6 kV/cm and Pr = 22.6 were obtained for the specimen containing 2 mol% CuO sintered at a suitable temperature. Cu2+ ions acted as a hardener, which increased the Ec, Pr, and Qm values of (Na0.5K0.5)NbO3-LiTaO3 ceramics.

Original languageEnglish
Pages (from-to)169-173
Number of pages5
JournalJournal of Alloys and Compounds
Volume488
Issue number1
DOIs
Publication statusPublished - 2009 Nov 20

All Science Journal Classification (ASJC) codes

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

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