采用共沉淀法制备了MgO/SnO2纳米复合粉体.用热重分析(TG)、X射线衍射仪(XRD)、透射电镜(TEM)和能谱(EDS)对样品的物相、形貌、粒径和组成进行了表征.并用DSC考察了纳米MgO/SnO2对RDX热分解的催化作用.结果表明:400℃煅烧样品的平均粒径约为3nm,MgO的掺杂可提高纳米SnO2粒子的热稳定性和对RDX热分解的催化作用,它使RDX的分解峰温降低了8.5℃,分解热增加了518J·g-1(约50％).
Composite nanoparticle MgO/SnO2 was prepared by the coprecipitation method. The particle size, structure, phase
and composition of samples were characterized by TG, XRD, TEM and EDS. The catalytic activity of product on the thermal decomposition of RDX was
determined by DSC. The results show that average particle size of samples are about 3nm. Mg doping takes the role of improving the thermal stability,
and can enhance the catalytic activity of product. The samples can make the peak temperature of thermal decomposition of RDX decrease 8.5℃,
and make the decomposite enthalpy ΔH of RDX increase 518J·g-1 (about50%).
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