(南京理工大學(xué) 國(guó)家特種超細(xì)粉體中心，南京 210094)
摘 要: 為了提高Mg粉的水反應(yīng)活性和抗氧化能力，采用氣相沉積和液相沉積法對(duì)Mg粉進(jìn)行二次包覆改性處理得到復(fù)合粉末。利用粒度分析、SEM、XRD等測(cè)試手段對(duì)復(fù)合粉末進(jìn)行測(cè)試和表征，采用熱分析法對(duì)復(fù)合粉末的抗氧化性能進(jìn)行分析，并通過測(cè)定樣品與水反應(yīng)產(chǎn)生氫氣的量對(duì)其水反應(yīng)活性進(jìn)行了表征。結(jié)果表明：Mg粉表面連續(xù)均勻地包覆無機(jī)和有機(jī)的膜層，制備出的復(fù)合粉末呈現(xiàn)出Mg−包覆劑A−HTPB核殼膜結(jié)構(gòu)；經(jīng)包覆處理后的Mg粉的抗氧化能力及與水的反應(yīng)速率和程度均得到提高，達(dá)到在一定條件下控制Mg粉與水反應(yīng)的目的。
關(guān)鍵字: Mg；推進(jìn)劑；包覆；水反應(yīng)燃料
（National Special Superfine Powder Engineering Research Center,Nanjing University of Science and Technology, Nanjing 210094, China）
Abstract:To improve their water-reactivity and antioxidant activity, the surfaces of Mg powders were re-modified by vapor deposition and liquid deposition methodologies. The coated Mg powders were characterized by and analyzed by using laser particle size analyzer, scanning electron microscope and X-ray diffraction. The antioxidant activity was measured by DSC, while the hydrogen generating ability was determined by the amount of hydrogen produced. The results show that the re-modified surfaces of Mg powders are uniformly coated with inorganic and organic thin films, and the composite Mg powders are meso-structured as Mg-coating reagent A-HTPB. The antioxidant activity of Mg powders and their ability to react with water are improved due to the surface re-modification, which makes it possible to control the reaction between Mg powders and water.
Key words: Mg; propellant; coating; hydroreactive metal fuel
