Preparation and Composition Regulation of Boron Carbide Powder via Magnesiothermic-SHS
SHI Hao1,2, DOU Zhihe1,2,*, MENG Yang1,2, ZHANG Ting'an1,2
1 Key Laboratory for Ecological Metallurgy of Multimetallic Mineral, Ministry of Education, Northeastern University, Shenyang 110819, China 2 School of Metallurgy, Northeastern University, Shenyang 110819, China
Abstract: To address the defects of low purity and high free boron content in the preparation of boron carbide (B4C) via Magnesiothermic-SHS method, this work investigated the formation rule and fugacity state of the impurity phase in the process of Magnesiothermic-SHS and the impurity phase removal rule via enhanced leaching, guided by thermodynamic equilibrium calculations. The results show that the ingredient ratio in SHS process is a fundamental factor affecting the phase composition of the SHS products. The content of B4C and MgO phases in the SHS products gradually increases with the increase of Mg content, while the content of Mg3B2O6 decreases. When the Mg content reaches the stoichiometric ratio and then increases, there is no obvious change in the phase content of the products. The MgO byproduct phase from the SHS products can be effectively removed by acid leaching, while the intensive removal of the Mg3B2O6 impurity phase requires the closed enhanced acid leaching, which can enhance the purification effect. The Mg residue in the leached product decreases to 2.06% and the free boron content decreases to 3.61%. The B4C product is agglomerated particles with an average particle size of 5.30 μm and a specific surface area of 13.36 m2·g-1.
作者简介: 石浩,东北大学博士研究生,2014年9月至2018年7月,在东北大学获得冶金工程专业工学学士学位,本科毕业后在本校直接攻读博士学位。以第一作者发表学术论文一篇,参加国内会议两次并以第一作者发表会议论文两篇,申请国家发明专利1项。主要研究方向为自蔓延冶金、碳化硼陶瓷材料。豆志河,东北大学教授、博士研究生导师,国家自然科学基金优秀青年基金获得者。先后获得东北大学冶金物理化学、有色金属冶金、材料学专业的学士、硕士、博士学位。主持国家自然科学基金优秀青年基金、国家科技支撑计划重大项目、973计划、中央直属高校基本业务费重点项目及企业攻关项目20余项。在Hydrometallurgy、Transactions of Nonferrous Metals Society of China、ISIJ International等冶金权威期刊发表论文140多篇,SCI收录32篇次(SCI影响因子累计41.2),EI收录108篇次,他引700多次;获国家发明专利120余项、PCT专利3项;出版学术专著3部。主要研究方向为自蔓延冶金、多级还原制备钛粉、Cu-Cr合金冶炼等。
引用本文:
石浩, 豆志河, 孟扬, 张廷安. 镁热自蔓延高温合成碳化硼粉体及其成分调控研究[J]. 材料导报, 2022, 36(16): 21060212-6.
SHI Hao, DOU Zhihe, MENG Yang, ZHANG Ting'an. Preparation and Composition Regulation of Boron Carbide Powder via Magnesiothermic-SHS. Materials Reports, 2022, 36(16): 21060212-6.
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2022, Vol. 36 
