The present study investigates the effect of sintering additives (Li, Co, Fe, and Mg) on the sintering kinetic behavior of the praseodymium-doped-ceria (PDC) electrolyte of solid oxide electrolyzer cell. 3Li-PDC, 3Co-PDC, 3Fe-PDC, and 3 Mg-PDC pellets were obtained from the synthesis of PDC nano-powder by microwave-assisted co-precipitation method using isopropyl alcohol as a solvent and followed by sintering additive wetness impregnation method. Linear shrinkage and shrinkage rate data suggest a positive sintering effect for 3Li-PDC and 3Co-PDC pellets and a negative sintering effect for 3 Mg-PDC and 3Fe-PDC pellets than compared to PDC pellets alone. The addition of lithium as a sintering additive (3Li-PDC) had reduced the sintering temperature of PDC from 1100 °C to 850 °C. For PDC, 3Li-PDC, 3Co-PDC, 3Fe-PDC and 3 Mg-PDC pellets sintered at 1100 °C, 850 °C, 1000 °C, 1200 °C, 1100 °C for 2 h resulted in a relative density of 93.6 ± 0.25, 95.8 ± 0.45, 95.0 ± 0.20, 92.7 ± 0.10, and 94.5 ± 0.10%, respectively. The XRD patterns of the sintered PDC pellets suggested a secondary phase formation (PrO₂) in 3Co-PDC, 3Fe-PDC, and 3 Mg-PDC pellets indicating that the addition of these sintering aids results in poor solubility limit of Pr in CeO₂. On the other hand, XRD patterns of PDC and Li-PDC sintered pellets displayed no secondary peak indicating good solid-solution formation. The activation energy of the 3Li-PDC pellet is obtained from CHR and Dorn methods and was found to be 182 kJ/mol and 196 kJ/mol. From the CHR method, for the 3Li-PDC pellet, the initial sintering behavior is by the grain boundary diffusion mechanism (m = ~2).

本研究研究了烧结添加剂（Li，Co，Fe和Mg）对固态氧化电解池cell掺杂二氧化铈（PDC）电解质烧结动力学行为的影响。通过微波辅助共沉淀法，以异丙醇为溶剂，通过PDC纳米粉的合成，再烧结加湿浸渍法，得到了3Li-PDC，3Co-PDC，3Fe-PDC和3 Mg-PDC颗粒。 。线性收缩率和收缩率数据表明，与单独的PDC丸相比，3Li-PDC和3Co-PDC丸的烧结效果为正，而3 Mg-PDC和3Fe-PDC丸的烧结效果为负。添加锂作为烧结添加剂（3Li-PDC）已将PDC的烧结温度从1100°C降至850°C。对于PDC，3Li-PDC，3Co-PDC，在1100°C，850°C，1000°C，1200°C，1100°C烧结2 h的3Fe-PDC和3 Mg-PDC球粒的相对密度为93.6±0.25、95.8±0.45、95.0±0.20 ，92.7±0.10和94.5±0.10％。烧结的PDC球团的X射线衍射图表明存在二次相（PrO₂）在3Co-PDC，3Fe-PDC和3 Mg-PDC颗粒中，表明添加这些烧结助剂会导致Pr在CeO _2中的溶解度极限变差。另一方面，PDC和Li-PDC烧结球团的XRD图谱没有二次峰，表明形成了良好的固溶体。通过CHR和Dorn方法获得3Li-PDC颗粒的活化能，发现活化能为182 kJ / mol和196 kJ / mol。根据CHR方法，对于3Li-PDC球团，初始烧结行为是通过晶界扩散机制（m =〜2）。