Paper Title:
Electrical Properties and Phase Transition Behavior of (Li,Na,Ba)(Nb,Ti)O3 Lead-Free Piezoelectric Ceramics
  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.

  Info
Periodical
Key Engineering Materials (Volumes 421-422)
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
R. Aoyagi, R. Rinaldi, N. Sumiyama, M. Iwata, M. Maeda, "Electrical Properties and Phase Transition Behavior of (Li,Na,Ba)(Nb,Ti)O3 Lead-Free Piezoelectric Ceramics", Key Engineering Materials, Vols. 421-422, pp. 42-45, 2010
Online since
December 2009
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$32.00
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