Ferroelectric Relaxor Behavior of Ba(Ti0.91Zr0.09)O3 Ceramics

Ba (Ti0.91Zr0.09) O3 ceramics doped with Bi2O3 and Li2O respectively were prepared by a solid phase reaction. The effect of A-site donor-acceptor doped on dielectric properties was investigated. Dielectric properties were measured from −30°C to 130°C at different frequencies. Relaxor behavior was observed with increasing additive oxides concentration. Additive oxides introduce structural disorder, causing perturbations like local electric field and strain. These perturbations reduce the long-range polar order resulting in relaxor behavior. The corresponding relaxor characteristics were determined and discussed according to the A-site substituted cation type.