Preparation of High Energetic Solid Fuel Amorphous Boron Powder and Microstructure of Combustion Products
It is necessary to explore new technique that might obtain the high grade amorphous boron powder. The reductive process was investigated on preparing the boron powder by the magnesiothermic reduction of B2O3. The boron powder with 94.6％B content was obtained with B2O3/Mg (wt) ratio 3.0, the systematic temperature 850℃, Mg particle size 100-200 mesh, B2O3 particle size 80-100 mesh and the time of constant temperature 30min. During process of combustion, the excess B2O3 was combined with the product MgO into the compounds xMgO·B2O3(x=3, 2) which was a little difficult to be dissolved by acid. The XRD spectrums of combustion products before and after acid leaching show that MgB6 is made by the product B and Mg. Mg2SiO4 is combined by the product MgO and SiO2 and FeB49 is combined by the product B and a little Fe2O3. The grade of boron powder is affected by insoluble matter MgB6, Mg2SiO4, FeB49 and a little difficult insoluble matter xMgO·B2O3.
magnesiothermic reduction amorphous boron powder, solid fuel combustion products insoluble matter, grade
WU Jijun MA Wenhui YANG Bin Dai Yongnian ZHANG Guangli ZHAI Yuchun
The national Engineering Laboratory of Vacuum Metallurgy, Faculty of Materials and Metallurgical Eng School of Materials and Metallurgy, Northeastern University, Shenyang 110004, Liaoning, China
国际会议
西安
英文
44-47
2007-10-23（万方平台首次上网日期，不代表论文的发表时间）