Figure 3

(a) Raman spectra of KNN-xBST ceramics as a function of composition. (b, c) The fitted Raman spectra using Eq. (2) at some selected composition. (d) The frequency shift (upper part) of Raman active modes, and the FWHM and intensity of the CP (lower part) of KNN-xBST ceramics as a function of composition.