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《Chinese Journal of Explosives & Propellants》 2008-06
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Preparation,Mechanical Sensitivity and Thermal Decomposition Characteristics of RDX Nanoparticles

SONG Xiao-lan1,2,LI Feng-sheng1,ZHANG Jing-lin2,WANG Yi1,AN Chong-wei1,GUO Xiao-de1(1.National Special Superfine Powder Engineering Research Center,Nanjing University ofScience and Technology,Nanjing 210094,China;2.School of Chemical Engineering and Environment,North University of China,Taiyuan 030051,China)  
Via introducing 1,2-epoxypropane as the agent for speeding up the hydrolyzation of Fe(Ⅲ) ions,RDX/Fe2O3 wet gel had been prepared by sol-gel method under the mild condition,then the RDX/Fe2O3 aerogel was obtained by means of CO2 supercritical extraction.Subsequently,the RDX nanoparticles were prepared until the amorphous Fe2O3 had been etched completely with diluted hydrochloric acid.TEM,SEM,EDS,XRD and DSC were employed to characterize the nano-RDX and to investigate its thermal decomposition characteristics,and mechanical sensitivity was tested.Results indicated that the as-prepared RDX nanoparticles is about 60-90nm.The impact sensitivity of nano-RDX is lower than that of the raw RDX somewhat,while its explosive probability for friction sensitivity is higher than that of raw RDX by 54%.The peak temperature and the activation energy for thermal decomposition of nano-RDX decreased by 10.74℃ and 18020J·mol-1,respectively,compared with those of the raw RDX.
【Fund】: 国家自然科学基金资助项目(50602024);; 总装备部预研项目(62301070203)
【CateGory Index】: TB383.1
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