首页|Electrical Properties and Phase Transition Behavior of (Li,Na,Ba)(Nb,Ti)O_3 Lead-Free Piezoelectric Ceramics

Electrical Properties and Phase Transition Behavior of (Li,Na,Ba)(Nb,Ti)O_3 Lead-Free Piezoelectric Ceramics

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  • Trans Tech Publications Ltd
The electrical properties and phase transition behavior of the sodium niobate-based solid solution (1-x)Li_(0.12)Na_(0.88)NbO_(3-x)Na_(0.91)Ba_(0.09)Nb_(0.91)Ti_(0.09)O_3 [(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.

lead-free piezoelectric ceramicsNaNbO_3LiNbO_3BaTiO_3dielectric propertyphase transition

Rintaro Aoyagi、Rian Rinaldi、Naoki Sumiyama、Makoto Iwata、Masaki Maeda

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Department of Engineering Physics, Electronics and Mechanics, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan

2010

10.4028/www.scientific.net/KEM.421-422.42

Key engineering materials

Key engineering materials

ISSN：1013-9826
年,卷(期)：2010.421/422
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