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Influence of  ( K 0.5 Bi 0.5 )TiO 3  (KBT) dopants on crystal and microstructure, ferroelectric and dielectric properties of ceramic composition from morphotropic phase boundary in the system (1– x – y )(Na 0.5 Bi 0.5 )TiO 3  –  x BaTiO 3  –  y( K 0.5 Bi 0.5 )TiO 3  ( x  = 0.06,  y  = 0–0.15) additionally modified by ZnO additives was studied using a complex of methods. Changes from 42.8 nm to 62.6 nm of the volume-weighted crystallite size distribution function G(L) corresponding to coherent scattering regions were observed. The microstructure and the second harmonic generation data indicated a change in the relative content of polar nanoregions in tetragonal nonpolar matrix. Decrease in temperatures of phase transitions  Tm  and  Td  was observed with KBT concentration increasing.

Dielectric properties and crystallite size distribution of modified lead-free sodium-bismuth titanate ceramics