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《Chinese Journal of Energetic Materials》 2015-10
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Reaction Properties of Super Thermites

ZHENG Bao-hui;WANG Ping-sheng;LUO Guan;LU Xiao-jun;Institute of Chemical Materials,CAEP;  
With Fe2O3、CuO、Fe3O4、MoO3 as oxidants,50 nm or 5μm aluminum particle as reducer,twelve thermites were prepared by mixing them under ultrasonic shock. Structure and morphology of the thermites were studied by scanning electron microscope( SEM). The effects of oxidizer agent species and particle size of the materials on the reaction activity of thermites were studied by differential scanning calorimetry( DSC) and laser ignition. Results show that the dispersion of nanometer aluminum particle in MoO3 is the best. The reaction order from high to low is Al / MoO3Al / Fe2O3Al / CuOAl / Fe3O4. When using nanometer aluminum particle,the critical reaction temperature of super thermites decreases 200-400 ℃,lower than that of micrometer aluminum particle. The critical reaction temperature decreases only 10-30 ℃ using nanometer oxidants,lower than that using corresponding micrometer materials. All the results indicate that particle size of aluminum particle is the key factor effecting the reaction activity of thermites,and ultra-refinement of oxidizer is only supplementary for the reaction activity of thermites. When the aluminum particle size locates on the same order,the reaction activity of thermites mainly depend on the species of oxidants.
【Fund】: 中国工程物理研究院科学技术发展基金(2012B0302038);; 国防基础科研计划重大专项(C1520110001)
【CateGory Index】: TQ560.1
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