ELECTRICAL PROPERTIES AND THERMAL EXPANSION OF COBALT DOPED APATITE-TYPE LANTHANUM SILICATES BASED ELECTROLYTES FOR IT-SOFC
Cobalt doped lanthanum silicates La10Si6-xCoxO27-x/2 (x=1.5, 1.0, 0.8, 0.6, 0.4, 0.2) were successfully synthesized by sol-gel process. The effect of doping Co on the thermal expansion and the ionic conductivity was investigated. The results of XRD analysis showed that the unit volumes of La10Si6-xCoxO27-x/2 (x=1.5, 1.0, 0.8, 0.6, 0.4, 0.2) increase with cobalt content. In addition, the thermal expansion coefficient increased with cobalt content. La10Si5.2Co0.8O26.6 exhibited the highest ionic conductivity of 3.33×10-2 S/cm at 800℃. La10Si6-xCoxO27-x/2 showed low activation energies of around 0.7eV above 600℃. These show that La10Si6-xCoxO27-x/2 can be a potential electrolyte for IT-SOFC.
QINGLE SHI JIANG JIN HUA ZHANG
College of Material Science and Engineering, Nanjing University of Technology,No.5 Xinmofan Road, Na College of Material Science and Engineering, Nanjing University of Technology, No.5 Xinmofan Road, N
国际会议
The 12th Asian Conference on Solid State Ionics(第十二届亚洲固态离子学会议暨第十五届中国固态离子学会议)
武汉
英文
50-57
2010-05-02（万方平台首次上网日期，不代表论文的发表时间）