表面钝化纳米铝粉的制备及氧化机理分析  

Study on Preparation of Surface Passivated Aluminum Nanopowders and Its Oxidation Mechanism

作　　者：王建军[1] 宋武林[1] 郭连贵[1] 谢长生[1] 

机构地区：[1]华中科技大学材料学院材料成形与模具技术国家重点实验室,湖北武汉430074

出　　处：《表面技术》2008年第2期42-44,58,共4页Surface Technology

基　　金：国家自然科学基金项目(50471061)

摘　　要：采用高频感应线圈加热，以蒸发一冷凝法制备了纳米铝粉，用空气进行钝化处理，得到有钝化层保护的纳米铝粉。使用透射电镜、场发射扫描电镜、X射线衍射、差热分析DTA等测试手段，研究了表面钝化处理对纳米铝粉抗氧化性能的影响。结果表明：经过表面钝化处理的纳米铝粉粒径范围为15～60nm，纳米铝粉表面包覆了3～5nm厚的氧化铝膜，形成明显的核／壳结构，具有较好的抗氧化性能，这对于纳米铝粉的存储、活性保护机理的探讨有一定的意义。Aluminum nanopowders were synthesized by high frequency induction evaporation condensation method, and aluminum nanopowdcrs was treated by passivation in air. The influence of surface passivation treatment on the oxidization resistance of aluminum nanopowders was investigated by means of several techniques, such as TEM, ESEM, X-ray diffraction, differential thermal analysis. The results show that aluminum nanopowders treated by passivation with size from 15nm to 60nm are covered by oxide layers with size from 3nm to 5nm, and shape the core structure. Aluminum nanopowders have good oxidization resistance. It is very important for studying the mechanism of storing and activity protection about Aluminum nanopowders.

关 键 词：含能材料 纳米铝粉 钝化 制备 氧化机理 

分 类 号：TG174.45[金属学及工艺—金属表面处理] V512[金属学及工艺—金属学]