Ce_0.8Sm_0.2O_2-δ (SDC), Ce_0.8Pr_0.2O_2-δ (PDC), and Ce_0.83Sm_0.085Pr_0.085O_2-δ (SPDC) samples were synthesized through a low-combustion sol-gel process modified using sucrose and pectin. Rietveld refinement of the samples' powder X-ray diffraction patterns showed a single phase with a cubic structure. Transmission electron microscopy images showed a particle size of around 23–38 nm, and these results were close to the average crystallite size calculated from Williamson-Hall plots. Morphology images were obtained by field-emission scanning electron microscopy; the results showed the samples’ dense surface with distinct grains. The solid solution and oxygen vacancies of the SPDC, SDC, and PDC samples were analyzed by means of the Raman spectra. The SPDC sample exhibited higher total electrical conductivity (2.63 × 10⁻² S/cm at 600 °C) and lower activation energy (0.68 eV) than the SDC sample (9.95 × 10⁻³ S/cm at 600 °C and 0.82 eV) and the PDC sample (7.99 × 10⁻³ S/cm at 600 °C and 0.85 eV). The ionic and electronic transference numbers of the SPDC sample were 0.90 and 0.10, respectively, at 500 °C.

Ce _0.8 Sm _0.2 O _{2- δ} (SDC)、Ce _0.8 Pr _0.2 O _{2- δ} (PDC) 和 Ce _0.83 Sm _0.085 Pr _0.085 O _{2- δ}(SPDC) 样品是通过使用蔗糖和果胶改进的低燃烧溶胶-凝胶工艺合成的。样品粉末 X 射线衍射图的 Rietveld 细化显示具有立方结构的单相。透射电子显微镜图像显示颗粒大小约为 23-38 nm，这些结果接近由 Williamson-Hall 图计算的平均微晶尺寸。通过场发射扫描电子显微镜获得形态学图像；结果表明，样品表面致密，颗粒明显。通过拉曼光谱分析了 SPDC、SDC 和 PDC 样品的固溶体和氧空位。SPDC 样品表现出更高的总电导率 (2.63 × 10 ^-2 S/cm at 600 °C) 和比 SDC 样品（9.95 × 10 ^-3  S/cm at 600 °C 和 0.82 eV）和 PDC 样品（7.99 × 10 ^-3  S/cm ）更低的活化能（0.68 eV）在 600 °C 和 0.85 eV 下）。SPDC 样品在 500 °C 时的离子和电子转移数分别为 0.90 和 0.10。