薄层钝化纳米铝粒子研究

Study on Aluminum Nanoparticles Surface Passivation

采用蒸发冷凝方法制备纳米铝粉，由于其表面具有很高的活性，对所制备的纳米铝粒子进行了袁面钝化。采用小角X射线散射测定纳米铝粉粒度，SEM、TEM、HRTEM、XRD、ED等方法分析钝化纳米铝的形貌、化学组成和结构。结果表明，所制备的钝化纳米铝的平均粒度为80nm，ED分析有Al和Al2O3的衍射斑点但，Al2O3的含量较少，与XRD的分析结果一致，HRTEM可见在Al颗粒的表面形成了厚度小于5nm的均匀氧化膜。

Nano-phased aluminum particles were prepared by evaporation-condensation method. The oxygen passivation process is followed because of it＇s high activation. Particle size is determined by SAXS（ small angel X-ray scattering）and SEM, TEM, HRTEM, XRD and ED are employed to analyse the shape, structure and component of the product, whose average diameter is less than 80nm. ED patterns show the presence of electron diffration spots of Al and Al2 O3 with little content consistent with XRD analysis results. We obtain the symmetrical oxidation membrane surrounding the aluminum inner core whose thickness less than 5nm using HRTEM analysis.