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Piezoelectric properties of CuO-added (Na0.5K0.5)NbO3 ceramic multilayers
- Authors
- Seo, In-Tae; Kang, In-Young; Cha, You-Jeong; Choi, Jae-Hong; Nahm, Sahn; Sung, Tae-Hyun; Jung, Hyun-Chul
- Issue Date
- May-2012
- Publisher
- Elsevier BV
- Keywords
- Piezoelectric properties; Tape casting; Perovskite; Microstructure-final; Speaker
- Citation
- Journal of the European Ceramic Society, v.32, no.5, pp 1085 - 1090
- Pages
- 6
- Indexed
- SCI
SCIE
SCOPUS
- Journal Title
- Journal of the European Ceramic Society
- Volume
- 32
- Number
- 5
- Start Page
- 1085
- End Page
- 1090
- ISSN
- 0955-2219
1873-619X
- Abstract
- Multilayered ceramics (MLCs) laminated with 20 layers of CuO-added (Na0.5K0.5)NbO3 (CNKN) tape were well sintered at 960 degrees C with an average grain size of 5.0 mu m. They exhibited good piezoelectric properties of epsilon(T)(33)/epsilon(0) = 709, d(33) = 114 pC/N, k(p) = 0.34 and Q(m) = 793. The 80Ag/20Pd electrodes were well formed on the CNKN MLCs when they were co-fired at 960 degrees C for 2 h. A piezoelectric speaker fabricated using 6-layer CNKN MLCs exhibited an average sound pressure level (SPL) of 75 dB in the range between 300 and 20,000 Hz with a maximum SPL of 90 dB. This value is comparable with that of a loud stereo radio, indicating that the CNKN MLC is a good candidate material for piezoelectric speakers.
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