中文摘要：

分别采用碳酸铵、碳酸钠和草酸铵为共沉淀剂,EDTA-柠檬酸和酒石酸为凝胶配体合成氧化铈基电解质Ce08Sm02O1.90（SDC）.通过X射线衍射光谱法、透射电子显微镜法、扫描电子显微镜法和交流阻抗法表征了粉体的晶相、粒径、形貌、烧结性和电导率.结果表明,碳酸铵、草酸铵和EDTA-柠檬酸分别为沉淀剂和配体时SDC烧结致密;共沉淀法制备的SDC具有较高的晶界电导率,而EDTA-柠檬酸配体使SDC具有较高的本体电导率,EDTA-柠檬酸和碳酸铵分别为配体和沉淀剂时,SDC的总电导率最高,600℃时分别达到0.018和0.015 S/cm,并讨论了影响的原因.

英文摘要：

SDC powders were respectively synthesized by co-precipitation method with ammonium carbonate, sodium carbonate and ammonium oxalate as co-precipitators, and sol-gel method with EDTA-citrate and tartaric acid as gelation ligands. Crystalline phase, particle size, sinterability and total conductivity were characterized by XRD, TEM, SEM and EIS. Dense SDC films were obtained when prepared with ammonium carbonate, ammonium oxalate and EDTA-citrate as co-precipitators or gelation ligand. The grain boundary conductivity of the SDC which synthesized by co-precipitation method was higher. The bulk conductivity of the SDC prepared with EDTA-citrate sol-gel method was higher. Total conductivity at tested temperature of SDC films prepared by ammonium carbonate co-precipitation and EDTA-citrate sol-gel method were higher than SDC prepared by other methods. Their conductivities were 0.015 S/cm and 0.018 S/cm at 600 ℃. It was tentatively discussed on how the co-precipitators and organic ligands affect the properties of SDC.