甲苯热还原法制备超细镍纳米微粉的研究  

Synthesis of Nickel Nano-particles via a Toluene Thermal Reduction Route

作　　者：米远祝[1] 

机构地区：[1]湖北民族学院化学与环境工程学院,湖北恩施445000

出　　处：《湖北民族学院学报（自然科学版）》2007年第4期427-429,共3页Journal of Hubei Minzu University(Natural Science Edition)

基　　金：湖北省科技厅国际合作项目(2006CA014);湖北省教育厅重点项目(B200729001)

摘　　要：以甲苯作为溶剂,在不锈钢反应釜中用KBH4还原NiCl2制备了超细镍纳米微粉.反应最佳温度为240℃,反应时间为10 h.X射线粉末衍射(XRD)结果显示,产物为单相的面心立方晶镍.透射电子显微镜(TEM)和扫描电子显微镜(SEM)结果显示,产品呈棉团状,这些棉团由细小的纳米颗粒组成.颗粒直径在2 nm左右,尺寸分布均匀.镍纳米微粉的磁矫顽力为73.37 Oe.Ukrafine nickel nano - particles has been synthesized through chemical reduction of nickel chloride by KBH4 using absolute toluene as solvent in a stainless steel autoclave at 240℃ for 10h. The products was characterized by X -ray powder diffraction （XRD）, transmission electron microscopy （TEM） and scanning electron microscopy （SEM）. XRD patterns show that the as - prepared sample is face - centered cubic （fcc） nickel. TEM and SEM images indicate that the fcc Ni is like cotton group composed of ultrafine nano - particles about 2 nm in diameter. The coercivity of the nickel nano - particles was as high as 73.37 Oe.

关 键 词：甲苯热还原法 镍纳米颗粒 磁性材料 

分 类 号：TM274[一般工业技术—材料科学与工程]