Piezoelectric Properties and Depolarization Temperatures of (Bi1/2Na1/2)TiO3-(Bi1/2K1/2)TiO3-BaTiO3 Lead-Free Piezoelectric Ceramics |
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| Journal | Key Engineering Materials (Volume 320) |
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| Volume | Electroceramics in Japan IX |
| Edited by | Keiichi Katayama, Kazumi Kato, Tadashi Takenaka, Masasuke Takata and Kazuo Shinozaki |
| Pages | 23-26 |
| DOI | 10.4028/www.scientific.net/KEM.320.23 |
| Citation | Yuji Hiruma et al., 2006, Key Engineering Materials, 320, 23 |
| Online since | September, 2006 |
| Authors | Yuji Hiruma, Kazushige Yoshii, Rintaro Aoyagi, Hajime Nagata, Tadashi Takenaka |
| Keywords | Bismuth Potassium Titanate, Bismuth Sodium Titanate (BNT), Depolarization Temperature, Dielectric Properties, Lead-Free Piezoelectric Ceramic, Morphotropic Phase Boundary, Piezoelectric Property |
| Abstract | The piezoelectric properties of a solid solution based on the three components of bismuth sodium titanate, (Bi1/2Na1/2)TiO3 (BNT), bismuth potassium titanate, (Bi1/2K1/2)TiO3 (BKT), and barium titanate, BaTiO3 (BT), that is, x(Bi1/2Na1/2)TiO3-y(Bi1/2K1/2)TiO3-zBaTiO3 [BNBKy:z(x); x+y+z=1] are investigated. Fine piezoelectric properties in lead-free piezoelectric ceramics were obtained near the MPB composition, and the highest electromechanical coupling factors, k33 and kp, and piezoelectric constant, d33, were 0.58 and 0.36 for BNBK2:1(0.89) and 181 pC/N for BNBK2:1(0.88), respectively. In this study, we also measured the depolarization temperature, Td, from the temperature dependence of dielectric and piezoelectric properties. |
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