氧化铁是制造磁性材料、涂料和催化剂的基本原料,用途广泛。许多工业过程如钢铁冶炼以及催化剂活化均与其价态和还原行为密切相关。因此,研究其还原动力学,不仅具有理论意义,而且有很重要的应用价值。金属氧化物包括氧化铁的还原反应,前人已作了不少研究,然而有些基本问题还不够明确,或存在分歧意见。本文通过等温和程序升温还原实验,考察了α-Fe_2O_3和γ-Fe_2O_3的还原行为,对动力学模型和还原机制加以探讨。 Iron oxide is a basic raw material for the manufacture of magnetic materials, coatings and catalysts and has a wide range of uses. Many industrial processes such as steel smelting and catalyst activation are closely related to their valence and reduction behavior. Therefore, to study its reduction kinetics is not only of theoretical significance, but also of great value. Many studies have been made on the reduction reaction of metal oxides including iron oxide. However, some of the basic problems are not clear enough or there are different opinions. In this paper, the isothermal reduction procedure was used to investigate the reduction behavior of α-Fe_2O_3 and γ-Fe_2O_3, and the kinetic model and reduction mechanism were discussed.