富氧条件下电弧喷涂反应合成纳米氧化铝粉末

The synthesis of nano-alumina powder in the oxygen-rich surrounding by electric arc spraying

为了探寻一种高产率制备纳米氧化铝粉末材料的方法,借助常规铝丝材的空气电弧喷涂工艺,通过在压缩空气中加入不同比例的氧气,进行了氧化铝粉末电弧喷涂反应合成的实验研究.针对压缩空气中加入不同比例氧气喷涂后所获得的喷涂粉末样品进行的X射线衍射、粉末粒度分布等分析结果表明,富氧条件下的铝丝电弧喷涂不仅可以高效制备粒径约60-70 nm的Al2O3粉末,而且随着氧气比例的提高可以显著提高纳米Al2O3粉的产率,并进一步细化粉末的粒度.

For the exploration of a new high efficiency method for the nano-Al2O3 powder production, the Alwire arc spraying process is employed to synthesize the Al2O3 fine powders. The effects of different volume fractions of oxygen addition in the compressing air on the synthesized powder compositions and powder sizes were analyzed. The results show that the Al2O3 powder with the size of 60 - 70 nm can be obtained by the Al-wire arc spraying process in the oxygen-rich air. And with the increasing of the oxygen volume fraction in the compressed air the producing rate of the nano-Al2O3 powder can be effectively raised and also the sizes of the synthesized Al2O3 powder is obviously refined.