Ni/B微纳米复合粒子的制备与性能  

Preparation and Characterization of Ni/B Micro-Nano Composite Particles

作　　者：陈昕[1] 胥会祥[2] 魏永奇[1] 韩爱军[1] 叶明泉[1] 潘功配[1] 

机构地区：[1]南京理工大学,江苏南京210094 [2]西安近代化学研究所,陕西西安710065

出　　处：《稀有金属材料与工程》2013年第11期2376-2379,共4页Rare Metal Materials and Engineering

基　　金：国家部委科研项目(40406010201)

摘　　要：采用化学镀镍的方法制备Ni/B微纳米复合粒子。运用TEM、EDS和XRD方法对复合粒子的形貌、组成和物相进行表征,并通过TG-DTA热分析仪和热常数分析仪研究Ni/B微纳米复合粒子的热稳定性和导热系数。结果表明,真空干燥得到的复合粒子为核壳结构,纳米镍的尺寸约为21.7 nm,纳米镍粒子紧密均匀地包裹在硼粉表面,并且镍和硼的质量比为1:1;与原料硼粉相比,复合粒子与空气的反应放热峰提前36℃左右,表明纳米镍粒子具有明显的催化效果;同时,复合粒子的导热系数也有所增大。The synthesis ofNi/B micro-nano composite particles was studied by diamine hydrate reducing nickel chloride in the water bath at 50℃ in which nano-Ni was made to cover the surface of micron boron particles.The sample was characterized by TEM,EDS,XRD,TG-DTA and thermal conductivity instrument.The results show that this method can prepare a compact coating for Ni/B composite particles.The nano-Ni particles coated on boron particles are uniform and continuous,and the mass ratio of Ni and boron is 1∶1.The average diameter of Ni crystallites is about 21.7 nm.Compared with boron powder,the high temperature of exothermic peak of Ni/B micro-nano composite particles is decreased by about 36 ℃.The thermal chemistry behavior of the as-prepared composite particles is better than the superfine boron powder,and the thermal conductivity of Ni/B micro-nano composite particles is higher than that of the boron powder.

关 键 词：微纳米复合粒子 超细硼粉 纳米镍 化学镀法 

分 类 号：TB383.1[一般工业技术—材料科学与工程]