Lanthanum strontium ferrite is a promising cathode material especially because of its chemical stability and thermal expansion compatibility with respect to zirconia-based electrolyte materials. La0.80Sr0.20FeO3 is synthesized by the gel-combustion technique using citric acid as the fuel. A phase-pure powder belonging to the perovskite structure is obtained at lower calcination temperature of 850 A degrees C. The powders are tape-cast into tapes and detailed sintering studies are carried out between 1100 and 1450 A degrees C and for different sintering durations. A thermal expansion coefficient of 11.65 ppm/A degrees C from RT-1000 A degrees C is measured for the sample sintered at 1450 A degrees C for 6 h. The DC electrical conductivity is also measured for a number of samples having different sintered densities. Further, investigations on the chemical stability are demonstrated between this cathode and a scandia-doped zirconia electrolyte prepared in our laboratory.