自蔓延冶金法制备硼粉的基础研究  

Primary Research on Preparation of Boron Powder by Self-Propagating High-Temperature Synthesis with a Stage of Metallurgy

作　　者：豆志河[1] 张廷安[1] 王艳利[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2005年第1期63-66,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(50374026);辽宁省重点学科带头人培养计划项目(辽教办200117124206)

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·A new technique named self-propagating high-temperature synthesis with a stage of metallurgy was proposed to prepare boron powder. The adiabatic temperature(T_(ad)) in B_2O_3-Mg reaction system was calculated to be 2604K, 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 indicated that the apparent active energy of the exothermic peak of B_2O_3-Mg reaction system is 903.75kJ·mol^(-1) with reaction order equal to 1, and the XRD results showed that the combustion products are composed mainly of MgO, Mg_3B_2O_6 and B_2O_3. Thus the three-step leaching conditions were confirmed. The purity of boron powder can be up to 92.43% as indicated by spectral & chemical analyses. Its mean grain size is 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 

分 类 号：TF123.32[冶金工程—粉末冶金]