用室温湿固相反应制备了纳米氧化镧 ,并进行了表征。用DSC研究了纳米氧化镧对环三次甲基三硝胺 (黑索今 ,RDX)热分解反应的催化作用 ,并提出了该催化反应机理。实验结果表明 ,纳米氧化镧能有效地催化RDX的热分解 ,使RDX的二次分解肩峰消失 ,使RDX分解放热峰的后半峰变得陡直 ,并极大地增大了RDX的表观分解热 Nanostructured lanthana was prepared by wet-solid phase reaction at room temperature and characterized. The catalytic effect of nano-lanthanum on the thermal decomposition of cyclopentamethyltritrosamine (RDX, RDX) was studied by DSC, and the catalytic reaction mechanism was proposed. The experimental results show that nano lanthanum oxide can effectively catalyze the thermal decomposition of RDX, so that the secondary decomposition peak of RDX disappears, the latter half peak of RDX decomposition exothermic peak becomes steep, and the RDX table is greatly enlarged View points heat