Spinel oxides with the general formula Mn_1.7Cu_1.3-xFe_xO₄ (x= 0, 0.1, 0.3, 0.5) were prepared and evaluated in this work for their properties at high temperatures. The effect of partially substituting Cu by Fe has not been studied so far for this group of materials and is thus evaluated in this work.

Mn1.7Cu1.3-xFexO4 powders were synthesised by a soft chemistry process and studied in terms of crystallographic phase analysis, electrical conductivity, thermal expansion, and sinterability behaviour. The results show that the Fe content has a significant influence on the phase composition and the resulting properties. Characterisation of the dilatometry and conductivity coupled with XRD phase analysis across a wide temperature range allowed the relations between the materials properties and compositions to be observed. The results indicate that Mn1.7Cu0.8Fe0.5O4is a promising material for use as a protective coating for interconnects in intermediate temperature Solid Oxide Fuel Cells.

制备了通式为Mn _1.7 Cu _1.3-x Fe _x O ₄（x = 0、0.1、0.3、0.5）的尖晶石氧化物，并在高温下对其性能进行了评估。迄今为止，尚未研究过用Fe部分取代Cu的效果，因此在这项工作中对其进行了评估。

Mn1.7Cu1.3-xFexO4粉末是通过软化学方法合成的，并从结晶相分析，电导率，热膨胀和可烧结性方面进行了研究。结果表明，Fe含量对相组成和所得性能具有显着影响。膨胀系数和电导率的表征以及在较宽的温度范围内进行的XRD相分析使得可以观察到材料性能与组成之间的关系。结果表明，Mn1.7Cu0.8Fe0.5O4是一种有前途的材料，可用作中温固体氧化物燃料电池互连的保护涂层。