Fig. 2 show speak ratio at (200) and full width at half-maximum (FWHM) of (1x) BNT – xBKT ceramics (x¼0.21,0.14, 0.18,0.20 and 0.30).The peak ratio of (200) calculated by following equation [19]:
Peak ratio ð200Þ ¼ ½Peak intensity ð200Þ=X Peak intensity hkl ð Þh i ð1Þ