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首页> 外文期刊>Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing >Isothermal reduction behavior of Fe_2O_3/MnO composite materials with solid carbon
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Isothermal reduction behavior of Fe_2O_3/MnO composite materials with solid carbon

机译：固态碳Fe_2O_3 / MnO复合材料的等温还原行为

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摘要

Compacts of pure and 2% MnO doped iron oxide were reduced isothermally at 800-1100℃ by solid carbon. The reduction behavior was investigated using advanced quadrupole mass spectrometer. XRD and SEM analysis were used to characterize the reduced samples. The aim of this work is to clarify the reduction behavior of Fe_2O_3/MnO composite materials with solid carbon. The influence of reduction conditions on the structural characteristics of the products was extensively studied to get clear comprehension of reduction process. It was found that the reduction rate increases with temperature and decreases with the presence of MnO. The experimental measurements were used to elucidate the carbothermic reduction mechanism of iron oxide doped with MnO. The reactions proceeded in a stepwise manner and Boudouard reaction is the rate controlling step. The calculated values of activation energy revealed that solid state diffusion mechanism had a significant role in the reduction process.
机译：在800-1100℃下，固态碳等温还原了纯的和2％MnO掺杂的氧化铁的压块。使用先进的四极质谱仪研究了还原行为。 XRD和SEM分析用于表征还原后的样品。这项工作的目的是阐明Fe_2O_3 / MnO复合材料与固体碳的还原行为。广泛研究了还原条件对产品结构特征的影响，以使人们对还原过程有一个清晰的认识。发现还原速率随温度增加而随MnO的存在而降低。实验测量用于阐明掺杂MnO的氧化铁的碳热还原机理。反应以逐步的方式进行，并且Boudouard反应是速率控制步骤。活化能的计算值表明，固态扩散机理在还原过程中具有重要作用。

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