蒸发冷凝法制备超细镁粉

Preparation of ultrafine Mg powders with evaporation and condensation method

采用电阻加热蒸发和感应加热蒸发法分别制备出超细镁粉,系统研究了充气压力对粉体产率和粒度的影响,采用XRD、TEM等分析手段对所制备的粉体结构进行表征.结果显示:感应加热蒸发法的产率远大于电阻加热蒸发法的产率;随充气压力提高,粉体产率降低,粉体平均粒径增大.所制备的超细镁粉为链球形结构、多晶态,纯度较高,粒度分布范围窄.

Ultrafine Mg powders were prepared by resistance heating evaporation and induction heating evaporation respectively.The effects of gas pressure on the productivity and granularity of the powders were systematically studied.The powder structure was analyzed by XRD,TEM and other analysis methods.The results show that the productivity of induction heating evaporation is larger than that of resistance heating evaporation.The productivity decreases and the mean particle size increases with increasing gas pressure.The ultrafine Mg powders are polymorphic,with a chain-ball structure and high purity,and the distribution of particle size is narrow.