纳米铁-镍合金颗粒的制备及表征

采用液相还原法，在醇-水体系中存在表面活性剂的条件，于水相中将FeSO4和NiSO4还原为纳米铁-镍合金颗粒，利用XRD, SEM和振动样品磁强计等手段对样品进行表征. 结果表明，在150℃、摩尔比FeSO4/NiSO4 1:3及NaOH 4 g、水合肼15 mL、反应2 h的优化条件下，制备出单一相FeNi3合金颗粒，其饱和磁化强度为121.36 A×m2/g，矫顽力为1.42 A/m.

Preparation and Characterization of Iron-Nickel Alloy Nanoparticles

In ethanol-water system, Fe-Ni alloy nanoparticles were prepared by reduction of the mixture solution of FeSO4 and NiSO4 in the presence of surfactant with liquid-phase reduction method. Their samples were characterized by XRD, SEM and VSM, respectively. The results indicate that single FeNi3 alloy phase could be obtained under the optimized conditions of solution composition of molar ratio of FeSO4/NiSO4 at 1:3, 4 g NaOH and 15 mL N2H4×2H2O at 150℃ for 2 h, the values of saturation magnetization and coercivity were 121.36 A×m2/g, and 1.42 A/m. Besides, the influences of synthesis conditions on the magnetic properties of Fe-Ni alloy nanoparticles were also examined.