摘要
为了探究新型燃料十八氢二十硼酸双四甲基铵(Me_(4)N)_(2)B_(20)H_(18)的点火和燃烧特性,通过十氢十硼酸离子氧化法成功制得了该物质,并采用氧弹量热仪测定了其燃烧热值,使用高速摄像机和红外热成像仪记录颗粒燃烧时的火焰现象以及样品的表面温度;结合其在氮气和空气中的热重试验,探讨了其热稳定性与燃烧过程机制。结果表明,十八氢二十硼酸双四甲基铵实测密度为0.96g/cm^(3),且具有较高的热稳定性,在氮气中加热至250℃发生裂解,在空气中到240℃时先裂解失重,温度升至300℃时发生热氧化增重;(Me_(4)N)_(2)B_(20)H_(18)的实测质量热值为55.5MJ/kg,点火燃烧性能较好,在空气中燃烧时具有绿色特征火焰,燃烧过程中样品表面温度可达1100℃。
To explore the ignition and combustion characteristics of tetramethylammonium octadecahydro-eicosaborate((Me4N)2B20H18),the compound was obtained by the oxidation of decahydrodecaborate anion,and its combustion heat was measured using an oxybomb calorimeter,and a high-speed camera and infrared thermal imager were used to record the flame phenomenon and the surface temperature on the combustion process of the sample.In combination with the pyrolysis behaviors of the compound in nitrogen and air atmospheres,the combustion process of the(Me4N)2B20H18was evaluated.The results show that the actual density of the(Me4N)2B20H18was measured at 0.96 g/cm^(3),and the(Me_(4)N)_(2)B_(20)H_(18)exhibits high thermal stability,which decomposes at above 250℃in the nitrogen atmosphere.While in the air atmosphere,an evident mass increment was present at 300℃after a mass loss at 240—300℃.The combustion heat of the(Me_(4)N)_(2)B_(20)H_(18)is 55.5 MJ/kg.This compound presents good ignition combustion performance,and it burns in air with a green characteristic flame.Its surface temperature can reach 1100℃during the combustion process.
作者
金孟媛
张建侃
罗宇同
秦钊
赵凤起
郭艳辉
JIN Meng-yuan;ZHANG Jian-kan;LUO Yu-tong;QIN Zhao;ZHAO Feng-qi;GUO Yan-hui(Department of Materials Science,Fudan University,Shanghai 200433,China;Xi′an Modern Chemistry Research Institute,Xi′an 710065,China)
出处
《火炸药学报》
EI
CAS
CSCD
北大核心
2022年第6期856-861,共6页
Chinese Journal of Explosives & Propellants
基金
国家重大科研仪器研制项目(No.52027809)。
关键词
物理化学
多硼烷离子化合物
硼氢化合物
十八氢二十硼酸双四甲基铵
固体燃料
燃烧特性
physical chemistry
polyhydroborate anion compound
boron hydrides compound
tetramethylammonium octadecahydro-eicosaborate
solid fuel
combustion characteristics