Oxygen Nonstoichiometry and Mixed Conductivity of Doped LaCoO3-δ
Perovskite-type oxides of doped LaCoO3-δ powders were synthesized by Glycine-Nitrate process (GNP). The powders were characterized by XRD, SEM and laser granularity analysis. The results show that oxides are uniform aggregates with spherical shape and the granularity of aggregates distribute between 0.5～ 50μm. The oxygen nonstoichiometry values of the materials were measured by iodometric titration method. The results indicate the oxygen nonstoichiometry of doped LaCoO3-δ ceramics increase with increasing Co/Fe ratio. The mixed conductivity was investigated by DC four-terminal method, which indicates the cathode materials conductions enhance with the increasing of oxygen nonstoichiometry and temperature, as well as apparent density.
doped LaCoO3-δ cathode material of SOFC oxygen nonstoichiometry mixed conductivity
YU Jie MA Wen-hui WANG Hua HE Tian-chun
Faculty of Materials and Metallurgical Engineering, Kunming University of Science and Technology, Ku Faculty of Materials and Metallurgical Engineering, Kunming University of Science and Technology, Ku Yunnan Provincial Department of Education, Kunming 650093,China
国际会议
北京
英文
102-104
2006-08-03（万方平台首次上网日期，不代表论文的发表时间）