Combustion of B4C/KNO3 binary pyrotechnic system  

作　　者：Jing-ran Xu Chen-guang Yan Chen-guang Zhu 

机构地区：[1]Department of Applied Chemistry,School of Chemical Engineering,Nanjing University of Science and Technology,Nanjing,Jiangsu,China

出　　处：《Defence Technology（防务技术）》2021年第2期692-702,共11页Defence Technology

基　　金：The support for this work was provided by the National Natural Science Foundation of China(Project No.51676100).

摘　　要：Presented herein is an experimental study on the combustion of B4C/KNO3 binary pyrotechnic system.Combustion products were tested using X-ray diffraction(XRD),scanning electron microscopy(SEM),and energy dispersive spectrometer(EDS).According to the results of tests and CEA calculation,the combustion reaction equation was established.The flames and burning rates were recorded by a high speed camera and a spectrophotometer.The effect of B4C particle size on the thermal sensitivity of B4C/KNO3 was investigated by differential scanning calorimetry(DSC)techniques.In addition,a reliable method for calculating the flame temperature was proposed.Based on the results of experiments,the combustion reaction mechanism was briefly analyzed.The burning rate,flame temperature and thermal sensitivity of B4C/KNO3 increase with the decrease of B4C particle size.The mass ratio of B4C/KNO3 has a great effect on combustion properties.Oxidizer-rich compositions have low flame temperatures,low burning rates,and provide green light emission.The combustion reactions of fuel-rich compositions are vigorous,and the B4C/KNO3 with mass ratio of 25:75 has the highest burning rate and the highest flame temperature.

关 键 词：PYROTECHNICS COMBUSTION FLAME Boron carbide 

分 类 号：V231.2[航空宇航科学与技术—航空宇航推进理论与工程]