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Effect of CuO on the sintering temperature and piezoelectric properties of (Na0.5K0.5)NbO3 lead-free piezoelectric ceramics
- Authors
- Park, Hwi-Yeol; Choi, Joo-Young; Choi, Min-Kyu; Cho, Kyung-Hoon; Nahm, Sahn; Lee, Hyeung-Gyu; Kang, Hyung-Won
- Issue Date
- 7월-2008
- Publisher
- WILEY
- Citation
- JOURNAL OF THE AMERICAN CERAMIC SOCIETY, v.91, no.7, pp.2374 - 2377
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF THE AMERICAN CERAMIC SOCIETY
- Volume
- 91
- Number
- 7
- Start Page
- 2374
- End Page
- 2377
- ISSN
- 0002-7820
- Abstract
- When a small amount of CuO was added to (Na0.5K0.5)NbO3 (NKN) ceramics sintered at 960 degrees C for 2 h, a dense microstructure with increased grains was developed, probably due to liquid-phase sintering. The Curie temperature slightly increased when CuO exceeded 1.5 mol%. The Cu2+ ion was considered to have replaced the Nb5+ ion and acted as a hardener, which increased the E-c and Q(m) values of the NKN ceramics. High piezoelectric properties of k(p)=0.37, Q(m)=844, and epsilon(T)(3)/epsilon(0)=229 were obtained from the specimen containing 1.5 mol% of CuO sintered at 960 degrees C for 2 h.
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