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个人信息Personal Information
副教授
硕士生导师
任职 : 中国无机盐工业协会硼化工分会秘书长, 全国无机盐信息总站硼化物协作组秘书长, 中国化工学会无机酸碱盐专委会硼化物专家组成员, 辽宁省硼镁资源化工与新材料工程技术研究中心副主任, 辽宁省硼镁特种功能材料制备与应用技术工程实验室副主任, 辽宁省非金属矿工业协会副会长.
性别：男
毕业院校：近畿大学
学位：博士
所在单位：化工学院
学科：化学工艺. 功能材料化学与化工
办公地点：大连理工大学西部校区化工综合楼A610
电子邮箱：jczhong@dlut.edu.cn
Combustion synthesis of CaB6 powder from calcium hexaborate and Mg
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论文类型：期刊论文
发表时间：2010-03-01
发表刊物：INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
收录刊物：SCIE、EI、Scopus
卷号：28
期号：2
页面范围：143-149
ISSN号：0263-4368
关键字：Combustion synthesis; Calcium hexaboride; X-ray diffraction; Scanning electron microscopy
摘要：As one of the important metal-borides, calcium hexaboride (CaB6) is applied in refractory materials, metal deoxidant, neutron absorbent, wear-resisting agent and functional ceramic materials. Generally, CaB6 is produced from B4C or B2O3 which is obtained at high temperature and high cost. In this study, the CaB6 powder was prepared through combustion synthesis by using calcium hexaborate and magnesium as starting materials. The calculated adiabatic temperature of CaB6O10-Mg system reached 2406.69 K. The XRD analyses of combustion products showed that there existed a small amount of Mg3B2O6 and Ca-3(BO3)(2) besides CaB6 and MgO. The XRD patterns of products leached by HCl indicated the major part of the leached sample is comprised by CaB6, showing that MgO and by-products were efficiently leached out. In addition, the technological conditions for combustion synthesis were investigated. It is resulted that larger particle size of CaB6O10 and higher compacting pressure is beneficial to the production of CaB6. (C) 2008 Published by Elsevier Ltd.