Fig. 3 exhibits the SEM micrographs of the ceramics withx=0
and 0.065. For the pure BNT ceramic (i.e.,x= 0), the grains are
large, having a diameter in the range of 3–4lm(Fig. 3a). The introduction of BaTiO3in (1x)BNT–xBT system induce the reduction of
grain size of the compound