Electrical Properties and Polarization Reversal in (Li,Na)NbO3 Lead-Free Piezoelectric Ceramics

Takayuki Ohashi; Rintaro Aoyagi; Masaki Maeda; Makoto Iwata

doi:10.4028/www.scientific.net/KEM.485.69

Paper Titles

High-Temperature Depolarization of Alkali Niobate Lead-Free Piezoceramics
p.53

Piezoelectric Properties of (Li, Na, K)NbO₃ Ceramics with Monoclinic System
p.57

Piezoelectric Properties of Porous Potassium Niobate System Ceramics
p.61

Piezoelectric Properties and Enhancement of Moisture-Resistance of K_0.5Na_0.5NbO₃ by Adding ZnO-Based Glass
p.65

Electrical Properties and Polarization Reversal in (Li,Na)NbO₃ Lead-Free Piezoelectric Ceramics
p.69

Ferroelectric and Piezoelectric Properties of Bi₄Ti₃O₁₂ Single Crystals Grown by Top-Seeded Solution Growth Method at High Oxygen Pressure
p.73

Microstructure Control of Barium Titanate Grain-Oriented Ceramics and their Piezoelectric Properties
p.77

Single Phase Formation and Electric Properties of Bismuth Niobium Based Perovskite-Type Oxides
p.81

Piezoelectric Properties of Perovskite-Type Lead-Free Piezoelectric Ceramics under Large Amplitude Continuous Driving
p.85

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Electrical Properties and Polarization Reversal in (Li,Na)NbO₃ Lead-Free Piezoelectric Ceramics

Abstract:

In this study, the relationships between the electrical properties and polarization switching of lead-free (Li_0.06Na_0.94)NbO₃ (LNN6) ceramics were investigated. The electrical properties of stoichiometric LNN6 did not change with polarization switching. On the other hand, the frequency dependence of the impedance of Na-deficient LNN decreased with polarization switching, and the coupling factor k_p, the piezoelecric constant d₃₃ and the dielectric constant ε33T/ε0 decreased with polarization switching. Moreover, the dielectric curve of Na-deficient LNN6 after 10 switchings showed peaks at approximately 330, 400 and 500 °C