The XRD patterns obtained from (1x)BNT–xBKT ceramics(0.12 rxr 0.30) with Cu-Kα radiation are shown in Fig. 1. Fig. 1 shows the XRD patterns with 2θ ranging from 20–701. Eachof the ceramics exhibited a single perovskite phase and any secondary phase wasno tobserved.In the case of samples with x 40.12,XRD peaks slightly shifted to lower angles compared with the 0.80BNT- 0.20BKT pattern ,indicating an in crease in the lattice parameters.