Sm and Ti co-doped ceria-based mixed ion-electronic conductor with the compositions of Sm 0.2 Ce 0.8−x Ti x O 2− δ (x = 0–0.15) are prepared by a gel-casting process. The effects of addition of Ti on the phase compositions, the sintering behavior, and the electrochemical properties of sample are investigated. The article tentatively discusses the relation of conductivity with Po 2 by defect principles. Results show that the single-phase fluorite structure can be formed only at 500 °C, the addition of certain quantity TiO 2 can promote the sintering densification with a uniform grain growth. When the sintering temperature is 1350 °C, the sample with 10% addition of Ti has the highest relative density, it reaches 98.94% of the theoretical density, which is much higher than the one prepared by the solid state method. The conductivity of samples decreases while the conductive activation energy increases by adding TiO

中文翻译：

---

TiO 2添加对SOFCs Ce 0.8 Sm 0.2 O 2−δ电解质材料电性能的影响

通过凝胶浇铸法制备了具有Sm 0.2 Ce 0.8-x Ti x O2-δ（x = 0-0.15）组成的Sm和Ti共掺杂的二氧化铈基混合离子电子导体。研究了Ti添加对相组成，烧结行为和样品电化学性能的影响。本文根据缺陷原理初步探讨了电导率与Po 2的关系。结果表明，仅在500°C时才能形成单相萤石结构，加入一定量的TiO 2可以促进烧结致密化，晶粒长大均匀。当烧结温度为1350°C时，添加10％Ti的样品具有最高相对密度，达到理论密度的98.94％，远高于通过固态方法制备的样品。