机械活化对镁金属真空碳热还原反应的强化作用初步研究  

Preliminary study on carbothermic reduction of magnesium in vacuum by mechanical activation

作　　者：张腾[1] 杜双明[1] 牛立斌[1] 蔡辉[1] 

机构地区：[1]西安科技大学材料科学与工程学院,陕西西安710054

出　　处：《轻金属》2015年第2期37-40,44,共5页Light Metals

基　　金：西安科技大学博士启动基金(项目编号:2014QDJ067);陕西省教育厅科研计划项目(项目编号:2013JK0900);陕西省科技统筹计划项目(项目编号:KTCQ1-17)

摘　　要：用机械活化法对镁金属的真空碳热还原反应进行了研究。为了突出机械活化对此反应的强化作用,在1273K、真空度为1000Pa的条件下,重点考察了机械活化时间对此反应的影响。实验获得了块状的银白色镁金属晶体,实验结果表明,该方法对此反应具有很好的强化作用。对机械活化后氧化镁的机械储能进行了分析和计算,计算结果显示:位错吉布斯自由能的增加是氧化镁机械储能增加的主要部分。并用谢乐公式对氧化镁的平均晶粒尺寸进行计算。The carbothermic reduction of magnesium in vacuum was studied by method of mechanical activation. In order to highlight the reinforcement of mechanical activation on the reaction, the effect of mechanical activation time on the reaction was investigated mainly at 1273K, under the vacuum degree of 1000Pa. The experimental results that gained crystal magnesium metal showed this method had good reinforcement on the reaction. Moreover, the me- chanical activation of mechanical energy storage of magnesium oxide was analyzed and calculated. Calculation results indicated the dislocation of the Gibbs free energy was the main part of mechanical energy storage of magnesium oxide. The average grain size of magnesium oxide was calculated using the Scherrer formula.

关 键 词：机械活化 氧化镁 真空 碳热还原 

分 类 号：TF822[冶金工程—有色金属冶金]