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): 267-270.DOI: -

• 论著 • 上一篇    下一篇

自蔓延冶金法制备硼粉的基础研究

豆志河;张廷安;王艳利   

  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);;

Primary research on preparation of boron powder by self-propagating high-temperature synthesis with a stage of metallurgy

Dou, Zhi-He (1); Zhang, Ting-An (1); Wang, Yan-Li (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： 提出采用自蔓延冶金法制备硼粉的新工艺·计算知B2O3 Mg反应体系的绝热温度(Tad)为2604K,对B2O3 Mg反应体系的相关反应进行了热力学分析,确定了采用自蔓延模式的可行性·差热分析(DTA)表明反应体系850～930℃放热峰的表观活化能为903 75kJ·mol-1,反应级数为n=1·X射线衍射分析表明燃烧产物主要由MgO,Mg3B2O6和B2O3等相组成,确定了燃烧产物的浸出条件以及三步浸出方案·光谱分析及化学分析表明硼粉纯度可达92 43%,平均粒度为0 5～0 8μm·

关键词: 自蔓延冶金, 绝热温度, 无定形硼粉, DTA, X射线衍射分析

Abstract: A new technique named self-propagating high-temperature synthesis with a stage of metallurgy was proposed to prepare boron powder. The adiabatic temperature (Tad) in B2O3-Mg reaction system was calculated to be 2604 K, through which the thermodynamic data of correlative reactions were analyzed to determine the feasibility of the self-propagating high-temperature synthesis reaction consequently. The DTA results indicate that the apparent active energy of the exothermic peak of B2O3-Mg reaction system is 903.75 kJ·mol-1 with reaction order equal to 1, and the XRD results show that the combustion products are composed mainly of MgO, Mg3B2O6 and B2O3. Thus the three-step leaching conditions were confirmed. The purity of boron powder can be up to 92.43% as indicated by spectral and chemical analyses. Its mean grain size is 0.5-0.8 μm.

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