In this paper, the structural, microstructural, electrical and magnetic properties of an Mn₂CoO₄ spinel synthesized by means of EDTA gel processes are reported. The Rietveld refinement analysis of high-temperature X-ray diffraction (HT-XRD) data revealed the formation of a tetragonal Mn₂CoO₄ phase. This phase undergoes a structural change into a cubic phase at elevated temperatures, and this process is associated with a change in lattice parameters. The afore-mentioned phase transition was also investigated via high-temperature Raman spectroscopy. Temperature-dependent magnetization data revealed changes in the magnetic ordering temperature, which had been caused by the formation of antiferromagnetic (AFM) and ferromagnetic (FM) phases at low temperatures. Electrical conductivity increased with temperature and reached a level of 4.3 S⋅cm⁻¹in air at 1073 K, which indicates that the spinel exhibited semiconducting properties. This oxide can be considered as a material for protective-conducting coatings on ferritic stainless steel used to manufacture interconnects for solid oxide fuel cells.

本文报道了通过EDTA凝胶法合成的Mn ₂ CoO ₄尖晶石的结构，微观结构，电学和磁学性质。高温X射线衍射（HT-XRD）数据的Rietveld精细分析表明形成了四方Mn ₂ CoO _4。相。该相在升高的温度下经历结构改变成立方相，并且该过程与晶格参数的改变有关。还通过高温拉曼光谱研究了上述相变。随温度变化的磁化数据显示，磁性排序温度发生了变化，这是由低温下反铁磁（AFM）和铁磁（FM）相的形成引起的。电导率随着温度的升高而增加，在1073 K的空气中达到4.3 S·cm ^-1的水平，这表明尖晶石具有半导体性能。该氧化物可以被认为是用于制造用于固体氧化物燃料电池的互连的铁素体不锈钢上的保护性导电涂层的材料。