在有、无外加磁场的条件下,采用电镀的方法在天然鳞片石墨的表面上镀覆了一层均匀的镍颗粒.分别用扫描电子显微镜、X射线衍射仪及振动样品磁强计对产品进行了分析,研究了外加磁场对镍的沉积形貌、晶体取向及磁性质的影响.结果显示:镍颗粒在无磁场下电沉积时为近球形,在外加磁场下沉积时为刺球形,两者都为面心立方单晶结构,但后者具有较高的饱和磁化强度和较低的矫顽力.这些实验现象表明,外加磁场在镍的沉积过程中对镍的晶体生长有影响.
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