燃烧-还原法制备超细MgNi_2合金粉末的研究  

Preparation of Ultra Fine MgNi_2 Powder by Combustion and Reduction Process

作　　者：米远祝[1] 胡卫兵[2] 但悠梦[2] 刘应亮[3] 

机构地区：[1]长江大学化学与环境工程学院,湖北荆州434023 [2]湖北民族学院化学与环境工程学院,湖北恩施445000 [3]暨南大学化学系,广东广州510632

出　　处：《广州化学》2008年第1期10-13,共4页Guangzhou Chemistry

基　　金：湖北省科技厅国际合作项目(2006CA014);湖北省教育厅项目(B200729001)

摘　　要：以Mg(NO3)2和Ni(NO3)2为原料,用甘氨酸作为氧化剂,采用燃烧法制备约50 nm的混合金属氧化物前躯体,再在H2气氛保护下的管式炉中用CaH2还原制备MgNi2合金。利用X-射线粉末衍射仪、透射电子显微镜、扫描电子显微镜对样品的成分、晶体结构和形貌进行了分析,产品为粒度200 nm左右的单相MgNi2合金粉末。制备MgNi2合金的最佳反应温度为850℃,反应时间为3h,制备混合氧化物前驱体时甘氨酸和硝酸根(Gly/NO3-)的最佳配比为0.15。Preparation of ultra fine MgNi2 powder via reduction of the oxide precursor was systematically studied. The precursor was prepared with nickel nitrate, magnesium nitrate and glycin （Gly） as start materials by combustion method. The samples were characterized by X-ray diffraction （XRD）, transmission electron microscopy （TEM） and scanning electron microscopy （SEM）. The product was MgNi2 particles which have sizes about 200 nm. The optimum conditions were reaction temperature of 850℃, reaction time of 3h in the reduction process and Gly / NO3^- of 0.15 in the oxidation process.

关 键 词：燃烧-还原法 制备 超细MgNi2合金 

分 类 号：O614.813[理学—无机化学]