自蔓延高温合成MgB_2粉末  

MgB_2 powder synthesized by a self-propagating high-temperature method

作　　者：韩欢庆[1] 卢惠民[1] 邱定蕃[1] 褚征军[2] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京1000832 [2]钢铁研究总院,北京100081

出　　处：《北京科技大学学报》2006年第2期144-147,共4页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金(No.50374013)

摘　　要：利用自蔓延高温合成法成功制备了 MgB_2粉末．通过热力学计算、X 射线衍射图谱分析了各相生成的先后顺序及转化关系,探讨了合成反应产物中的相组成、MgB_2的分解温度等．结果表明,自蔓延高温合成法能制备无 MgB_4等杂质相的单相 MgB_2,且晶粒细小易于分解．MgB2 powder was successfully synthesized by a self-propagating high-temperature method. Thermodynamic calculation and XRD analysis were used to investigate the powder＇ s synthesizing order and transforming relationship between different Mg-B phases. Phase composition and decomposition temperature in the synthesis process were discussed. The results show that MgB2 phase has synthesized without other impurities such as MgB4. The particle size is small and the MgB2 is easy to decompose.

关 键 词：二硼化镁 粉末 自蔓延高温合成 超导材料 

分 类 号：TM26[一般工业技术—材料科学与工程]