镍纳米晶微粒的显微结构及磁性  

Microstructure and Magnetic Properties of Nickel Nano-crystalline Particles

作　　者：周丹[1] 刘先松[1] 邱士星[1] 贾道宁[1] 胡峰[1] 王鹏鹏[1] 

机构地区：[1]安徽大学物理与材料科学学院磁性材料安徽省工程技术研究中心,安徽合肥230039

出　　处：《磁性材料及器件》2010年第3期33-35,共3页Journal of Magnetic Materials and Devices

摘　　要：利用微波还原乙酸镍制备了镍纳米晶微粒。借助X射线衍射(XRD)、场发射式扫描电子显微镜(FESEM)和振动样品磁强计(VSM)等对合成的镍纳米晶的物相、微观结构及其磁性能进行了表征。结果表明,当反应温度在120～130℃且反应时间为2h以上时,镍纳米晶保持为面心立方结构;晶粒的平均尺寸为100～150nm;反应时间为4h时,其矫顽力达到Hc=14.818kA/m,比饱和磁化强度为σs=45.20A.m2/kg。Nickel nano-crystalline particle was successfully prepared by microwave polyol-reduction technique. The phase composition,morphology and magnetic properties of the as-synthesized samples were characterized by X-ray diffraction （XRD）,filed-emission scanning electronic microscope （FESEM） and vibrating sample magnetometer （VSM）. The results showed that when the reaction temperature was 120-130℃ and reaction time was more than 2h,the nickel nano-crystalline was obtained with a face-centered cubic structure and an average size of about 100-150nm; when reaction time was 4h,nickel nano-crystalline particle was obtained with coercivity Hc of 14.818kA/m and the saturation magnetization σs of 45.20 A.m2/kg.

关 键 词：镍纳米晶 多羟基还原法 结构 磁性 

分 类 号：TB383[一般工业技术—材料科学与工程]