Abstract
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 language | English (US) |
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Article number | 09KD07 |
Journal | Japanese Journal of Applied Physics |
Volume | 52 |
Issue number | 9 PART2 |
DOIs | |
State | Published - Sep 2013 |
All Science Journal Classification (ASJC) codes
- General Engineering
- General Physics and Astronomy