Abstract: A sol-gel method was used for synthesizing Y³⁺-doped BaCeO₃ solid electrolyte BaCe_0.75Y_0.25O_3-δ. TG-DTA and sintering curves show that the sintering temperature for the sample is about 1 080 ℃. The X-ray diffraction analysis shows that the sample sintered at 1450 ℃ in air for 10 h was crystallized in a single perovskite phase. The result of the single cell H₂(wet),Ag｜BCY1450｜Ag,Air(dry),Air(dry) testing is that the single cells based on BCY1450 electrolyte have higher open voltage values within the range of intermedium-temperatures.

Key words: XRD pattern, IT-electrolyte, SOFC