This study explored the effects of mixing time on the purity and physical properties of synthesized perovskite (SrFe0.5Ti0.5O3-delta) powders. SrFe0.5Ti0.5O3-delta powders were prepared with solution combustion, in which various precursor solutions were utilized with different mixing times. The precursor powders were calcined at a certain temperature that was determined via thermogravimetric and Fourier-transform infrared analyses. Each batch of calcined powders underwent X-ray diffraction to analyze the purity and phase formation of the yield. By increasing the mixing time to 45 h, pure cubic-structured SrFe0.5Ti0.5O3-delta powders were formed and the crystallite size decreased. The average crystallite size decreased from 30.46 to 28.96 nm with the increase of mixing time (from 5 to 45 h). The powders produced after 45 h of mixing exhibited pure phase. These powders were further analyzed using field emission scanning electron microscopy (FESEM), dynamic light scattering (DLS), and energy dispersive X-ray spectroscopy (EDX). The average particle sizes of 1.5849 and 1.6219 mu m were measured with the statistical distribution of micrographs, which were obtained from FESEM, and DLS analysis, respectively. Results obtained from EDX confirmed that the elements were homogenously distributed after 45 h of mixing. To examine the suitability of pure SrFe0.5Ti0.5O3-delta powders as fuel cell cathode material, electrical conductivity was measured, obtaining a value of 6.32 S cm(-1). This value is higher than the electrical conductivity of the same composition of powders synthesized using solid-state method. (C) 2017 Elsevier B.V. All rights reserved.