Temperature Dependence of Raman Spectrum of Lead-Free Piezoelectric (Na0.5K0.5)NbO3-LiNbO3 Ceramics
(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.
Wei Pan and Jianghong Gong
T. Hotta et al., "Temperature Dependence of Raman Spectrum of Lead-Free Piezoelectric (Na0.5K0.5)NbO3-LiNbO3 Ceramics", Key Engineering Materials, Vols. 368-372, pp. 1893-1895, 2008