纳米CuO·PbO的制备及对RDX热分解的催化作用

Preparation of Nanocomposite CuO·PbO and its Catalysis on Thermal Decomposition of RDX

为了研究纳米CuO·PbO对推进剂燃烧的催化作用,以CuCl2·2H2O和Pb(NO3)2为原料,采用室温固相化学反应法制备出不同铜、铅摩尔质量比的纳米CuO·PbO粉体,产物粒径约15nm。用DSC测试了纳米CuO·PbO对RDX热分解特性的影响。结果表明:纳米CuO·PbO对RDX热分解有明显的催化效果,它使RDX的分解峰温降低了10.5℃,放热量增加了618J·g-1(约55.7%),活化能降低了46.05kJ·mol-1。

Nanocomposite CuO·PbO with different Cu/Pb mass ratio was prepared by solid state reaction method at room temperature using CuCl2·2H2O and Pb(NO3)2 as starting materials. The particle size,crystal form,and crystal phase were determined with XRD and TEM. Average particle size of samples is about 15 nm.The catalytic effects of nanocomposite CuO·PbO on the thermal decomposition of RDX were investigated by DSC. The results show that the peak temperature of thermal decomposition shifts downward by 10.5 ℃,the decomposition enthalpy increases by 618 J·g-1(about 55.7%),and the apparent activation energy of the thermal decomposition decreases by 46.05 kJ·mol-1.