Possibility of cofiring a nickel inner electrode in a (Na 0.5K0.5)NbO3-LiF piezoelectric actuator

Keisuke Kobayashi, Yutaka Doshida, Youichi Mizuno, Clive A. Randall

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Multilayer (Na0.5K0.5)NbO3 (NKN) ceramics are considered promising candidates for lead-free piezoelectric actuators. The possibility of cofiring a nickel inner electrode in an NKN-LiF ceramic was investigated by evaluating the electrical properties and microstructures. The fabricated Ni inner electrode multilayer actuator sintered in a reduced atmosphere exhibited comparable dielectric properties to those of bulk NKN ceramics. The electric-field-induced strain was approximately 210 pm/V. Analysis based on the Rayleigh model showed that the extrinsic non-180° domain wall motion was suppressed in the multilayer structure. The microstructure of the NKN ceramic was not affected by cofiring with nickel, and the NKN/ Ni interface was both compositionally and structurally sharp. These results imply that the NKN-LiF ceramic can be cofired with nickel without any deterioration of its properties.

Original languageEnglish (US)
Article number09KD07
JournalJapanese Journal of Applied Physics
Issue number9 PART2
StatePublished - Sep 2013

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)


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