活性模板法制备纳米镍粉体

Preparation of Nano Nickle Powder via Active Template Process

摘要:

采用活性模板法制备了高纯纳米镍(Ni)粉体。研究了影响纳米粉体性能的各种因素，通过X射线衍射(xRD)、透射电子显微镜(TEM)和激光粒度分析仪等手段对样品的成分、形貌、粒度及其分布进行了分析，探讨了活性模板的作用机理。结果表明：模板介质炭黑具有微反应器作用、空间位阻效应和较强的还原性，活性模板法制得的纳米Ni粉呈规则的球形链状分布，无明显团聚体，平均粒径为45．7nm，粒径分布窄，粒径范围在16．0nm～59．1nm。

关键词:纳米Ni 活性模板 微反应器 位阻 团聚

Abstract:

Active template process was successfully used to prepare nano nickel powder. The influences of different technology conditions on the properties of the nano nickel particles were investigated. Laser Granularity Instrument, XRD and TEM were used to analyze the properties of the samples respectively. The action mechanism of active template was also discussed. The results show that active template not only has micro-reactor action and steric stabilization function, but also acts as reducer during reaction. The nano nickel powder via active template process take on regular sphericity-chain morphology without obvious agglomeration and has fine particle size(45.7 nm) and narrow distribution(16.0 nm~59.1 nm).

Key words:Nano nickel powder,active template,micro-reactor,steric stabilization,conglomeration