纳米镍粉的形貌与磁性能

Shape and magnetic property of nickel nano-material

采用多元醇液相还原法，在乙二醇中还原制备出了球形、刺球形、线形、花状4种形貌的镍纳米材料。通过XRD和FESEM对镍粉的结构、形貌进行了分析，并用振动样品磁强计对不同形貌的纳米镍粉进行了磁性能分析。结果表明所制备的纳米镍粉为面心立方的单晶结构，晶粒尺寸在10～30nm之间，颗粒直径在200～300nm之间，主要为球形、刺球形、线形、花状4种形貌。线形纳米镍粉的矫顽力最高，刺球形和花状次之，球形的矫顽力最小。

Nickel nano-powders with four kinds of shape were prepared by polyhydric alcohol liquid reducing method. The crystal structures and micro-morphology of nickel powders were analyzed by X-ray diffraction （XRD） and field emission scanning electron microscope（FESEM）. The magnetism property of the products was characterized by vibrating sample magnetometer（VSM）. The results showed that the nickel powders were fcc structure. The size of the crystal grains ranged from 10-30nm,and the grains ranged from 200-300nm,the shapes are spherical,aristate spherical, linear and flowerlike. Linear nickel powder has the highest coercivity, followed by aristate spherical and flowerlike powder,spherical powder has the lowest coercivity.