Temperature Dependence of Raman Spectrum of Lead-Free Piezoelectric (Na0.5K0.5)NbO3-LiNbO3 Ceramics

Tatsuro Hotta; Kenichi Kakimoto; Hitoshi Ohsato

doi:10.4028/www.scientific.net/KEM.368-372.1893

Paper Titles

Material Design of Alkaline Niobate Piezoelectric Ceramics
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Preparation of KNbO₃ Powder by Modified Pechini Method from Layered Perovskite Aqueous Solution
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Phase Development during Mixed–Oxide Processing of a [Na_0.5K_0.5NbO₃]_1-x -[LiTaO₃]_x Powder
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Influence of Sintering Temperature and Sintering Aid on Electrical Properties of (K, Na)NbO₃-LT Ceramics
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Temperature Dependence of Raman Spectrum of Lead-Free Piezoelectric (Na_0.5K_0.5)NbO₃-LiNbO₃ Ceramics
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(1-x)(K_0.44Na_0.52Li_0.04)(Nb_0.84Ta_0.10Sb_0.06)O₃-xSrTiO₃ Lead Free Piezoelectric Ceramics
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Hydrothermal Synthesis of Na(Nb_1-xTa_x)O₃ Powder for Fabrication of Lead-Free Piezoelectric Ceramics
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Fabrication and Characterization of Li₂O Excess (Na_0.49K_0.49Li_0.02)(Nb_0.8Ta_0.2)O₃ Piezoelectric Ceramics
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Preparation and Characterization of High Textured KSr₂Nb₅O₁₅ Lead-Free Piezoelectric Ceramics
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Temperature Dependence of Raman Spectrum of Lead-Free Piezoelectric (Na_0.5K_0.5)NbO₃-LiNbO₃ Ceramics

Abstract:

(Na0.5K0.5)NbO3-LiNbO3 (LNKN) is a lead-free ceramics, reported to show the maximum piezoelectric property when the Li content is 6.0 mol%. The temperature dependence of the spectra was measured for LNKN in the 4.0-8.0 mol% range of Li content by using Raman scattering. The stretching and bending mode of NbO6 octahedron especially changed the form and/or frequency of the spectrum with increasing Li content from 5.0 to 6.0 mol%. The range of this composition is corresponding to the composition with the maximum piezoelectric property.