含氟层包覆镁粉的制备与燃烧性能  

Preparation and Combustion Performance of Magnesium Coated by Fluoride-containing Layer

作　　者：谢晓 朱晨光[2] 赵凤起[1] 仪建华[1] 秦钊[1] 李海建 Xie Xiao;Zhu Chenguang;Zhao Fengqi;Yi Jianhua;Qin Zhao;Li Haijian(Science and Technology on Combustion and Explosion Laboratory,Xi’an Modern Chemistry Research Institute,Xi’an 710065,China;School of Chemistry and Chemical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]西安近代化学研究所燃烧与爆炸技术重点实验室,西安710065 [2]南京理工大学化学与化工学院,南京210094

出　　处：《燃烧科学与技术》2023年第1期53-58,共6页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(21905224)。

摘　　要：使用聚四氟乙烯(PTFE)作为氟源,在高温电阻炉中将PTFE/Mg混合粉末加热到600℃后制备了包覆镁粉.使用XRD、SEM、EDS、TG-DSC和显微镜等对镁原料和包覆镁粉的反应特性进行了研究.结果表明:包覆镁中活性镁的含量为97.2%.在空气中反应时,其DSC上放热峰的起始反应温度比镁原料上升了233.9℃.燃烧过程中包覆镁形成了典型的壳核结构,且在燃烧后期,包覆层内的F-Mg相会转化为MgF2相并析出多余的Mg.PTFE was used as fluorine source and mixed with Mg powder,and the mixed powder was heated to 600 ℃ in a resistance furnace to prepare coated Mg powder. XRD,SEM,EDS and TG-DSC were used to study the ignition and combustion characteristics of Mg and coated powder. The results showed that the content of active Mg in the coated Mg powder was about 97.2%.The onset temperature of DSC exothermic peak of the coated Mg in the air increased by about 233.9 ℃ compared to that of uncoated Mg. A typical core-shell structure was formed and a reaction(transition from F-Mg phase into MgF2and Mg)was observed during its combustion.

关 键 词：聚四氟乙烯 镁 燃烧 

分 类 号：TK11[动力工程及工程热物理—热能工程]