东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2005, Vol. 26 ›› Issue (1): 271-273.DOI: -

• 论著 • 上一篇    下一篇

自蔓延高温合成LaB_6微粉的制备及表征

张廷安;豆志河;杨欢   

  1. 东北大学材料与冶金学院;东北大学材料与冶金学院;东北大学材料与冶金学院 辽宁沈阳　110004
  • 收稿日期:2013-06-24 修回日期:2013-06-24 出版日期:2005-01-15 发布日期:2013-06-24
  • 通讯作者: Zhang, T.-A.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50374026);;

Preparation of LaB6 micropowder by self-propagating high-temperature synthesis and characterization

Zhang, Ting-An (1); Dou, Zhi-He (1); Yang, Huan (1)   

  1. (1) Sch. of Mat. and Metall., Northeastern Univ., Shenyang 110004, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2005-01-15 Published:2013-06-24
  • Contact: Zhang, T.-A.
  • About author:-
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摘要： 采用自蔓延方法制备出LaB6微粉·对热爆产物和浸出产物进行X射线衍射分析,确定了两步酸浸方案·对LaB6进行TEM分析和光谱分析,并利用扫描电镜(SEM)和粒度分布测试仪对LaB6进行了表征·结果表明:热爆产物由LaB6,MgO,少量Mg3B2O6以及LaOCl等相组成,采用盐酸和硫酸两步交叉浸出获得纯净的单一相LaB6·计算得LaB6晶格常数a=0 4148nm,LaB6纯度大于99%,LaB6的平均粒径为1 92μm·

关键词: 自蔓延高温合成, 光谱分析, 六硼化镧, 微区分析, 扫描电镜分析

Abstract: LaB6 micropowder was prepared by self-propagating high-temperature synthesis (SHS). SHS process in which the thermally explosible and leachable products were checked by XRD, then a two-step leaching procedure was therefore confirmed. The LaB6 prepared was analyzed and characterized by TEM, spectral analysis, SEM and granularity analyzer. The results indicate that the thermally explosible products consist of LaB6, MgO and bits of Mg3B2O6 and LaOCl, and that the single pure phase LaB6 can be obtained using HC1 then H2SO4 in an interlacing way in leaching process. The crystal lattice constant of LaB6 was calculated as a = 0.4148 nm, with its purity lower than 99% and the mean grain size is 1.92 μm.

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