Electrical Properties and Phase Transition Behavior of (Li,Na,Ba)(Nb,Ti)O3 Lead-Free Piezoelectric Ceramics |
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| Journal | Key Engineering Materials (Volumes 421 - 422) |
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| Volume | Asian Ceramic Science for Electronics III and Electroceramics in Japan XII |
| Edited by | Tadashi Takenaka, Hajime Haneda, Kazumi Kato, Masasuke Takata and Kazuo Shinozaki |
| Pages | 42-45 |
| DOI | 10.4028/www.scientific.net/KEM.421-422.42 |
| Citation | Rintaro Aoyagi et al., 2009, Key Engineering Materials, 421-422, 42 |
| Online since | December, 2009 |
| Authors | Rintaro Aoyagi, Rian Rinaldi, Naoki Sumiyama, Makoto Iwata, Masaki Maeda |
| Keywords | BaTiO3, Dielectric Properties, Lead-Free Piezoelectric Ceramic, LiNbO3, NaNbO3, Phase Transition |
| Abstract | The electrical properties and phase transition behavior of the sodium niobate-based solid solution (1-x)Li0.12Na0.88NbO3-xNa0.91Ba0.09Nb0.91Ti0.09O3 [(1-x)LNN12-xNNBT9] ceramics were investigated. The lattice constant changes became discontinuitous between LNNBT0.5 and LNNBT0.7. Moreover, the peak dielectric constant of LNNBT0.7 is twice that of LNNBT0.5. X-ray diffraction analysis and dielectric study confirmed that the different crystal phases of what are LNN-type rhombohedral (x=0), LNN-type orthorhombic (x=0.1, 0.3 and 0.5), NNBT-type orthorhombic (x= 0.7 and 0.9) and NNBT-type tetragonal (x= 1.0) phases. An electromechanical coupling factor of 0.244 was obtained for LNNBT0.7 whose composition is near the boundary between the LNN-type and NNBT-type orthorhombic phases. |
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