Low-temperature sintering and piezoelectric properties of CuO-added 0.95(Na0.5K0.5)NbO3-0.05BaTiO3 ceramics

Hwi Yeol Park, Cheol Woo Ahn, Kyung Hoon Cho, Sahn Nahm, Hyeung Gyu Lee, Hyung Won Kang, Duk Hee Kim, Kyeong Soon Park

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90 Citations (Scopus)


The sintering temperature of 0.95(Na0.5K0.5)NbO 3-0.05BaTiO3 (NKN-BT) ceramics needs to be decreased below 1000°C to prevent Na2O evaporation, which can cause difficulties in poling and may eventually degrade their piezoelectric properties. NKN-BT ceramics containing CuO were well sintered at 950°C with grain growth. Poling was easy for all specimens. Densification and grain growth were explained by the formation of a liquid phase. The addition of CuO improved the piezoelectric properties by increasing the grain size and density. High piezoelectric properties of d33=230 pC/N, kp=37%, and ε3T0=1150 were obtained from the specimen containing 1.0 mol% of CuO synthesized by the conventional solid-state method.

Original languageEnglish
Pages (from-to)4066-4069
Number of pages4
JournalJournal of the American Ceramic Society
Issue number12
Publication statusPublished - 2007 Dec

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry


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