【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.更多还原

【Abstract】 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 MgF₂ and Mg）was observed during its combustion.更多还原