In this work, \((1-x)\text{Ba}_{0.85}\text{Ca}_{0.15}\text{Ti}_{0.9}\text{Zr}_{0.1}\text{O}_{3} - x\text{Sr}_{0.7}\text{Bi}_{0.2}\text{TiO}_{3}\) (BCZT–SBT) ceramics with \( x = 0 \) and \( x = 0.025 \) were prepared through the conventional solid-state route. The samples were calcined at \(1200\,^{\circ}\text{C}\) for \(6\,\text{h}\), then re-milled, pressed into pellets, and sintered at \(1325\,^{\circ}\text{C}\) for \(6\,\text{h}\). XRD patterns indicate the formation of a cubic perovskite structure. A small decrease in lattice parameter is observed upon introducing SBT (\(a\) decreases from \(4.0176\,\text{Å}\) to \(4.0149\,\text{Å}\)), accompanied by a slight reduction in unit-cell... More >

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 >