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This work presents a study of ceramics with the (K_(0.44)Na_(0.52)Li_(0.04))_(0.97)La_(0.01)Nb_(0.9)Ta_(0.1)O_(3) composition through their Raman spectra. In the previous studies [1], this particular composition has shown good permittivity and piezoelectric parameter values that justify a deeper investigation. Two sets of samples of these ceramic compounds were prepared using different methods. The first set was prepared using a classical solid-state reaction of oxides and carbonates, as described in Ref. 2. The second set was prepared using the NaNbO_(3) as a precursor. The Raman spectra of the samples obtained by the direct ceramic method consisted of 4 modes. In contrast, the spectra of the samples obtained using the precursor showed a shift of the wavenumber of the A_(1g)(ν1) mode peak towards lower values and consisted of six modes with the appearance of two additional IR modes, F_(1u)(ν3) and F_(2g)(ν4). Notably, the use of the precursor preparation route led to important improvements resulting in a more straightforward method than that of Saito et al. [3].
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