Ce_0.8Gd_0.2O_2-δ-FeCo₂O₄ composite is an excellent oxygen transport membrane material with good chemical stability for applications in oxygen separation and membrane reactors. To improve microstructural and mechanical properties, sintering profiles for Ce_0.8Gd_0.2O_2-δ-FeCo₂O₄ composites were optimized. Different sintering temperatures are selected based on our study of phase interactions among the initial powder mixtures using high-temperature X-ray diffraction. The results reveal that the phase interaction at ∼1050 ℃ accelerates densification process, and a further increase of sintering temperature to 1200 ℃ contributes to the homogenization of the pore distribution. A higher density and an improved homogeneity of pore distribution result in enhanced mechanical strength. However, the density decreases once the sintering temperature reaches 1350 ℃. Hence, the optimal sintering temperature considering both microstructural and mechanical properties appears to be 1200 ℃. Sintering at this temperature results in a microstructure with a density exceeding 99 % with only small surface defects and a high average flexural strength of approximately 266 MPa.

Ce _0.8 Gd _0.2 O _{2- δ-} FeCo ₂ O ₄复合材料是一种优异的氧传输膜材料，具有良好的化学稳定性，可用于氧分离和膜反应器。为了改善微结构和机械性能，Ce _0.8 Gd _0.2 O _{2- δ-} FeCo ₂ O _4的烧结曲线复合材料进行了优化。基于我们对使用高温X射线衍射的初始粉末混合物之间的相相互作用的研究，选择了不同的烧结温度。结果表明，〜1050℃的相间相互作用加速了致密化过程，烧结温度进一步升高至1200℃有助于孔分布的均匀化。较高的密度和改善的孔分布均匀性可提高机械强度。但是，一旦烧结温度达到1350℃，密度就会降低。因此，兼顾微观结构和力学性能的最佳烧结温度为1200℃。