SrCe0.95Tb0.05O3-delta (SCT) membranes with perovskite-type structure were prepared by the citrate method. Both gas-permeable and hermetic membranes can be obtained through the control of sintering steps. Membranes made from powders treated by an intermediate sintering step tend to be porous and gas-permeable, while hermetic membranes can be formed at lower final sintering temperatures by eliminating the intermediate sintering step. The membranes can be gas-tight even at a relative density of 71%. The density of the membrane increases with the increase of final sintering temperature. The oxalic acid method does not produce SCT with desired perovskite structure due to deficiency of strontium in the solid precipitates. The SCT membranes show appreciable proton conduction in a hydrogen-containing atmosphere.