Polymorphic phase transition and enhanced electrical properties of (Ba0.91Ca0.09−xSrx)(Ti0.92Sn0.08)O3 lead-free ceramics

Lead-free (Ba0.91Ca0.09−xSrx)(Ti0.92Sn0.08)O3 ceramics were prepared by the solid state reaction method. Effects of Sr2+ content on the phase structure, electrical properties and temperature stabilities of the (Ba0.91Ca0.09−xSrx)(Ti0.92Sn0.08)O3 ceramics were investigated systematically. The polymorphic phase transition behavior from orthorhombic to tetragonal phase around room temperature was observed in the samples with 0.005