In this work, the effect of additives (Al\(_2\)O\(_3\), ZrO\(_2\), and Nb\(_2\)O\(_5\)) on the dielectric and ferroelectric properties of Sr\(_{0.7}\)Bi\(_{0.2}\)TiO\(_3\) (SBT) relaxor ferroelectric was investigated. Relative density of SBT was estimated to be above 95%. XRD analysis confirmed the formation of cubic perovskite structure for all the samples. \(P_{\text{max}}\) of SBT decreased by adding ZrO\(_2\), Nb\(_2\)O\(_5\) and Al\(_2\)O\(_3\), while remnant polarization (\(P_r\)) and coercive field (\(E_c\)) increased. For pure SBT, the breakdown strength was 75 kV which increased to 90 kV for ZrO\(_2\)- and Al\(_2\)O\(_3\)-added SBT but decreased to 60 kV when the additive was Nb\(_2... More >