Electrical Conductivity of the Manganese Chromite Spinel Solid Solution
Electrical Conductivity of the Manganese Chromite Spinel Solid Solution
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DOI：
10.1111/j.1551-2916.2005.00205.x
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发表时间：
2005-04
影响因子：
3.9
通讯作者：
Zigui Lu;Jiahong Zhu;E. Andrew Payzant;M. Paranthaman
中科院分区：
文献类型：
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作者：
Zigui Lu;Jiahong Zhu;E. Andrew Payzant;M. Paranthaman
合成并表征了基于Mn1+xCr2-xO4(0≤x≤1)的尖晶石相.当x=0.7时，尖晶石的晶胞参数随锰含量的增加而增大。在x>；0.7时，由于Jahn-Teller变形，立方尖晶石转变为四方相。尖晶石的电导率也随着锰含量的增加而增加。这一阶段的导电可能是通过一个小的极化子跳跃机制实现的。在固体氧化物燃料电池运行中，尖晶石相在氧化和还原环境中表现出类似的导电性。
Spinel phase based on Mn 1+x Cr 2-x O 4 (0 ≤ x ≤ 1) was synthesized and characterized. The lattice parameter of the spinel was found to increase with increasing Mn content up to x = 0.7. At x > 0.7, the cubic spinel changed to tetragonal because of Jahn-Teller distortion. The electrical conductivity of the spinel also increased with increasing Mn content. Electrical conduction in this phase was likely through a small polaron hopping mechanism. The spinel phase showed similar electrical conductivity in both oxidizing and reducing environments expected in a solid oxide fuel cell operation.