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

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

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

Paper Titles

Preparation and Characterization of Lead Free Multi-Layer Ceramic Actuators with Ni Inner Electrodes Prepared by Inkjet Printing
p.26

Growth and Characterization of Bismuth Magnesium Titanate Bi(Mg_1/2Ti_1/2)O₃
p.30

Phase Diagram and Microstructure Analysis of Barium Titanate – Potassium Niobate System Piezoelectric Ceramics
p.34

Crystal Structure Analysis of Barium Titanate – Bismuth Perovskite-Type Oxide System Ceramics and their Piezoelectric Property
p.38

Electrical Properties and Phase Transition Behavior of (Li,Na,Ba)(Nb,Ti)O₃ Lead-Free Piezoelectric Ceramics
p.42

Electrical Properties and Piezoelectric Properties of CaBi₂Ta₂O₉-Based Ceramics
p.46

Preparation of CaBi₄Ti₄O₁₅ Based Thick Films on Si Substrates by Screen Printing
p.50

Effects of Compressive Stress on Dielectric Properties of Lead-Free (Bi_1/2Na_1/2)TiO₃-(K_1/2Na_1/2)NbO₃ Ceramic Systems
p.54

Dielectric Properties of Low-Temperature Sintered Ba_0.6Sr_0.4TiO₃ Ceramics by Addition of Bi₂O₃-CuO Mixed Oxides
p.61

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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.