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PREPARING γ'-Fe_4N ULTRAFINE POWDER BY TWICE-NITRIDING METHOD

机译：二次氮化法制备γ'-Fe_4N超细粉

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摘要

Fe/N ultra fine powder is prepared by the method of one-step gas-phase synthesis, using FeCl_2 and NH_3 as raw materials. And γ'-Fe_4N ultra fine powder is prepared by trwice-nitriding the powder above. The processing and technique of preparing nitrided iron ultrafine powder by trwice-nitriding method was studied. Results show that γ'-Fe_4N can be producted. The physical properties of Fe/N and γ' -Fe_4N powder, such as crystalline state, physical phase, shape, chemical composition and magnetic properties, is charactized by means of XRD, TEM, XPS, VSM etc.. The Experiment results show that γ' -Fe_4N powder prepared by twice-nitriding is high pure, ultrafine and single phase. And the value of saturation magnetic susceptibility σ_s and coercive force H_c of this powder is preferable to Takuo Tanaka's corresponding study results.
机译：以FeCl_2和NH_3为原料，通过一步气相合成法制备了Fe / N超细粉。通过对上述粉末进行两次氮化处理，制备出γ'-Fe_4N超细粉末。研究了两次氮化法制备氮化铁超细粉的工艺和工艺。结果表明，可以生成γ'-Fe_4N。通过XRD，TEM，XPS，VSM等方法表征了Fe / N和γ'-Fe_4N粉末的物理性质，如晶体状态，物理相，形状，化学组成和磁性。经两次氮化制备的γ'-Fe_4N粉末为高纯，超细单相。并且该粉末的饱和磁化率σ_s和矫顽力H_c的值优于田中拓雄（Takuo Tanaka）的相应研究结果。

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