Preparation and magnetic properties of nickel nanorods by thermal decomposition reducing methods  

作　　者：罗愉 张建成 沈悦 江树涛 刘国勇 王林军 

机构地区：[1]School of Materials Science and Engineering,Shanghai University,Shanghai 200072,China

出　　处：《中国有色金属学会会刊：英文版》2006年第B01期96-100,共5页Transactions of Nonferrous Metals Society of China

基　　金：Project(90206017) supported by the National Natural Science Foundation of China

摘　　要：The single-crystalline nickel nanorods with narrow size distribution and better magnetic properties were synthesized by thermal decomposition of nickel hydroxide nanorods precursor powders, which were produced by soft template method using nickel oxalic acid as raw material. The influences of hydrothermal reaction temperature and time on morphology of the products were investigated. The structure, morphology and magnetic properties of the products were characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), thermogravimetric differential scanning calorimetry (TGA-DSC) and vibrating sample magnetometer (VSM). The as-prepared nickel nanorods are uniform with a diameter of 10?15 nm and length 70?120 nm. The results of magnetic measurements show that the specific saturation magnetization(σs) and coercivity values(Hc) of the nickel nanorods are 50.649 A·m2/kg and 190.0×(103/4π)A/m,respectively. Finally, a possible mechanism for the formation of nickel nanorods was discussed briefly.The single-crystalline nickel nanorods with narrow size distribution and better magnetic properties were synthesized by thermal decomposition of nickel hydroxide nanorods precursor powders, which were produced by soft template method using nickel oxalic acid as raw material. The influences of hydrothermal reaction temperature and time on morphology of the products were investigated. The structure, morphology and magnetic properties of the products were characterized by X-ray powder diffraction （XRD）, transmission electron microscopy （TEM）, thermogravimetric differential scanning calorimetry （TGA-DSC） and vibrating sample magnetometer （VSM）. The as-prepared nickel nanorods are uniform with a diameter of 10-15 nm and length 70-120 nm. The results of magnetic measurements show that the specific saturation magnetization（its） and coercivity values（He） of the nickel nanorods are 50.649 A·m^2/kg and 190.0 × （103/4π ）A/m,respectively. Finally, a possible mechanism for the formation of nickel nanorods was discussed briefly.

关 键 词：镍纳米棒 氢氧化镍 热降解还原法 制备 磁性质 

分 类 号：TB383.1[一般工业技术—材料科学与工程]