摘要
采用水热法合成海胆状纳米MnO2颗粒,用X射线粉末衍射(XRD)和扫描电子显微镜及X射线能谱分析(SEM-EDS)对该MnO2颗粒进行物相组成及结构表征;用固体研磨法制备出质量比为1∶2、1∶5和1∶9的纳米MnO2/CL-20混合物;用差示扫描量热(DSC)法考察了纳米MnO2对CL-20热分解性能的影响。结果表明,纳米MnO2的加入不会改变CL-20热分解过程的最可几机理函数;加入纳米MnO2后,MnO2/CL-20混合物的热分解峰温明显降低;与CL-20相比,不同质量比的MnO2/CL-20混合物表观活化能降低,表明海胆状纳米MnO2可以促进CL-20的热分解。
Sea urchin-shaped nano-MnO2 particles were synthesized using hydrothermal method. The phase composition and structure of MnO2 particles were characterized using X-ray diffraction (XRD)and scanning electron microscope-energy dispersive spectrometry (SEM-EDS).MnO2/CL-20 composites were prepared by grinding the mixture of nano-MnO2 and CL-20 with the mass ratio of 1∶2,1∶5 and 1∶9.The effect of nano-MnO2 particles on the thermal decomposition performance of CL-20 was studied by differential scanning calorimetry (DSC).The results indicate that nano-MnO2 does not change the most probable mechanism function of the thermal decomposition process of CL-20.The thermal decomposition peak temperature of CL-20 significantly decreases with the addition of nano-MnO2 .Compared with pure CL-20,the apparent activation energy of MnO2/CL-20 mixture with different mass ratios reduces,indicating that the sea urchin-shaped nano-MnO2 can accelerate the thermal decomposition of CL-20.
出处
《火炸药学报》
EI
CAS
CSCD
北大核心
2015年第2期19-24,34,共7页
Chinese Journal of Explosives & Propellants
基金
国家自然科学基金(21373161
21101127)
教育部新世纪优秀人才支持计划基金(12-1047)
高等学校博士学科点专项科研基金(20126101110009)资助项目
关键词
物理化学
海胆状纳米MnO2
CL-20
热分解机理
physical chemistry
sea urchin-shaped nano-MnO2
CL-20
thermal decomposition mechanism