【摘要】 用XRD和TEM等技术研究了水 (W )与表面活性剂 (S)比R(n(W ) /n(S) )对微乳液制备Ni Fe纳米复合物微粒的影响。结果表明 ,R值不同 ,得到的Ni Fe复合物微粒不但粒径不同 ,产物的组成也有差异。当R <18时 ,可得到Ni Fe合金相。所得复合物微粒的比饱和磁化强度为 5 0 0 2× 10 - 3～ 2 17 68× 10 - 3A/(m·g) ,而矫顽力可达 2 3 88～ 10 0 3 0kA/m ,剩余磁感应强度 2 8 2 8× 10 - 3～ 3 7 7× 10 - 3A/(m·g)。矫顽力随Ni Fe微粒粒径增加而减小更多还原

【Abstract】 The influence of water-to-surfactant-ratio R on the composition and size distribution of the Ni-Fe composite nanoparticles prepared by a microemulsion m ethod has been investigated. The results showed that the size and composition of nanoparticles would change with R value. When R<18 the Ni-Fe alloy would be obtained. It was found tha t the coereivity values of composite Ni-Fe particles were reduced with Ni-Fe particle size. The Ni-Fe nanoparticles had specific sa turation magnetization intensity of 50 02×10 -3 ～217 68× 10 -3 A/(m·g) ; coerevity values of 2 388～10 030 kA/m; and remanent magnetism of 28 28×10 -3 ～ 37 7×10 -3 A/(m·g) .更多还原