反应时间对纳米镍的形貌和磁性能的影响  

Effect of reaction time on the morphologies and magnetic properties of nickel nanocrystal

作　　者：张磊[1] 葛洪良[1] 钟敏[1] 

机构地区：[1]浙江省磁性材料实验基地,中国计量学院材料学院纳米材料化学制备室,浙江杭州310018

出　　处：《功能材料》2007年第A03期1261-1263,共3页Journal of Functional Materials

基　　金：国家自然科学基金资助项目（20571067）;中国计量学院自然科学基金资助项目（XZ0512,2006YB11）.

摘　　要：采用水热法制备得到了形态可控的纳米镍，研究了反应时间对纳米镍形貌及磁性能的影响。利用X射线衍射（XRD），场发射扫描电镜（FESEM）和振动样品磁强计（VSM）表征样品的结构，微观形貌和磁学性能。结果表明：（111）面的衍射峰的强度随反应时间的延长而增强，择优取向生长的趋势明显；随着反应时间的延长，纳米镍的形貌由颗粒演变为纳米棒；镍的饱和磁化强度（Ms）随反应时间的延长先增大后减小，矫顽力（Hc）随反应时间的延长而减小。Nickle nanomaterial with controlable shape has been synthesized by a simple hydrothermal method .The effect of different reaction time on the nickle morphology and magnetism are studied. The structure,micromorphology and magnetic properties of nickle nanocrystals were characterized by XRD, FESEM and VSM. The results indicate that the intensity of （111） plane diffraction peak enhanced with the increase of reaction time, which indicates nickle nanocrystals had a trend of the preferential orientation growth. With the increase of the reaction time, the morphology of nickle nanocrystals changed from spherical to rodlike. Ms firstly increased, then decreased and Hc decreased with the elongation of the reaction times.

关 键 词：镍颗粒 镍纳米线 水热法 磁性能 

分 类 号：TB383[一般工业技术—材料科学与工程] O482.5[理学—固体物理]