SINTERING, ELECTRICAL CONDUCTIVITY AND THERMAL EXPANSION OF MG-DOPED NdCrO3 SOLID SOLUTIONS
The properties of NdCr1-xMgxO3-δ (x=0.00-0.25) solid solutions were investigated as interconnect materials for solid oxide fuel cells. All the solid solutions are single orthorhombic perovskite structures at room temperature. The cell volumes and relative densities of the NdCr1-xMgxO3-δ solid solutions increase with the increase of Mg content. The NdCr0.75Mg0.25O3-δ sample has a maximum relative density of 97.4%. The conductivities and thermal expansion coefficients (TECs) increase with the increase of Mg content, and the NdCr0.75Mg0.25O3-δ sample presents the highest conductivity, which achieves 14.2 S cm-1 at 850 ℃ in air. The TEC of NdCr0.75Mg0.25O3 sample is 9.53×10-6 K-1 in the temperature range from 30 to 1000 ℃, which is close to that of YSZ electrolyte. The results demonstrate that Mg-doped NdCrO3 samples with high sinterability and electrical conductivity can be prepared using the solid state reaction in air through two medial calcining processes.
JIARUI CHEN YU SHEN QINGJUN ZHOU TIANMIN HE
State Key Laboratory of Superhard Materials, and College of Physics,Jilin University, 2699 Qianjin S State Key Laboratory of Superhard Materials, and College of Physics, Jilin University, 2699 Qianjin
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
668-675
2010-05-02（万方平台首次上网日期，不代表论文的发表时间）