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采用油包水(W/O)的微乳液体系制备纳米α-Fe。XRD、TEM分析表明,纳米α-Fe被Fe2B所包覆,其粒度在20~100nm;激光粒度分析表明,纳米α-Fe存在团聚现象,但粒度分布窄;TG-DSC分析表明,纳米α-Fe在>1100K时发生吸热的α-γ相变;磁强计检测表明,粉体具有铁磁性,其饱和磁化强度为1.14emu/g,剩余磁化强度为0.08emu/g,矫顽力为280Oe。
Nano-α-Fe was prepared by microemulsion system with water-in-oil (W / O). The results of XRD and TEM showed that nano-sized α-Fe was coated by Fe2B and its particle size was in the range of 20 ~ 100nm. Laser particle size analysis showed that nano-α-Fe was agglomerated but the particle size distribution was narrow. TG- The exothermic α-γ phase transition occurred when Fe> 1100K. The results of magnetometer showed that the powder had ferromagnetism and its saturation magnetization was 1.14emu / g, the remanent magnetization was 0.08emu / g, the coercivity was 280Oe.