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采用ＴＧ、ＸＲＤ、ＨＲＥＭ研究了掺硅针形超微粒α－Ｆｅ２Ｏ３在氮氢混合气中等温还原机理，并给出了等温还原动力学方程。ＴＧ研究结果表明，掺硅α－Ｆｅ２Ｏ３的等温还原过程符合缩核机理模型，ＨＲＥＭ照片也证实了这点；掺硅α－Ｆｅ２Ｏ３的等温还原动力学符合Ｅｒｏｆｅｅｖ方程。
The isothermal reduction mechanism of Si-doped needle-like ultrafine α-Fe2O3 in nitrogen-hydrogen mixed gas was studied by TG, XRD and HREM. The isothermal reduction kinetic equation was also given. TG results show that the isothermal reduction process of Si-doped α-Fe2O3 accords with the mechanism of nucleation mechanism, which is also confirmed by HREM photographs. The isothermal reduction kinetics of α-Fe2O3 doped silicon conforms to the Erofeev equation.