Mg_2Si金属间化合物微波固相合成研究  

Microwave direct synthesis of Mg_2Si intermetallic compound by solid state phase reaction

作　　者：纪振鹏[1] 周书才[1] 艾文杰[1] 杜志华[1] 赵晓隆[1] 

机构地区：[1]重庆科技学院冶金与材料工程学院

出　　处：《粉末冶金技术》2011年第3期206-209,213,共5页Powder Metallurgy Technology

基　　金：重庆市自然科学基金资助项目(CSTC;2009BB4228);重庆科技学院校内科研基金资助项目(CK2010Z09)

摘　　要：为了解决传统方法制备Mg2Si化合物过程中带来的Mg氧化,挥发等问题,引进微波低温固相反应法,成功合成了Mg2Si粉体。用XRD分析手段对合成的粉体物相进行了表征,并系统研究了合成工艺对粉体制备的影响。结果表明:Mg2Si压坯在微波场中的加热升温曲线与Mg2Si压坯密度有关,密度越大,升温速率降低。本试验条件下,当Mg过量8%(原子数分数)、加热功率在2.5kW(853K)下保温30min时,可以得到单相Mg2Si金属间化合物。In order to reduce the oxidizing and volatilizing caused by Mg element in the traditional methods for synthesizing Mg2Si compounds,solid state phase reaction at low temperature was introduced by microwave field.XRD was used to characterize the powders.At the same time,the influences of parameters during the synthesis process were discussed.The results suggest that the heating profile is also dependent on the initial green density and higher green density provides lower heating rate while power setting are fixed and the oxidation of Mg can be restrained by changing microwave heating programs.It is found that high purity Mg2Si intermetallic compound can be obtained with Mg content in excess of 8at% over the stoichiometric Mg2Si,heating at 853K for 30min.

关 键 词：Mg2Si化合物 低温固相反应法 微波合成 

分 类 号：TQ174.756[化学工程—陶瓷工业]