PREPARATION AND PROPERTIES OF NANO-AL/MOO3 THERMITE

  • W. L. ZHOU Nanjing University of Science and Technology
  • Xiu-Li HU Nanjing University of Science and Technology
  • Le-Qin XIAO Nanjing University of Science and Technology
  • Xiao-Xia JIAN Nanjing University of Science and Technology
Ключевые слова: MoO3 nanobelt, thermite, self-assembly, high-exothermic

Аннотация

MoO3 nanobelts were prepared by a facile hydrothermal method. The as-synthesized MoO3 nanobelts were used to integrate with nano-Al powder through two different approaches, .mixing nano-Al with MoO3 nanobelts ultrasonicly and combining nano-Al with MoO3 self-assembly. The physical-chemical properties of the as-prepared samples were carefully characterized by SEM, TEM, XRD, TGA/ DSC and drop weight impact test. The results show that the morphology of MoO3 is highly influenced by the addi-tive sequence and the concentration of ammonium paramolybdate. The onset oxidation temperature of self-assembled nano-Al/MoO3 is 478.5 ℃. Otherwise, the onset oxidation temperatures of nano Al pow-der, nano-Al/hydrothermal MoO3 and nano-Al/referenced Fe2O3 prepared by ultrasonic method are 540.8 ℃, 484.2 ℃ and 514.8 ℃ respectively. And the total exothermic heats of self-assembled nano-Al/MoO3 in the temperature of TG experiments are about 6696.0 J/g, and 801.6 J/g, 577.4 J/g and 4080.2 J/g higher than that of nano-Al/commercial MoO3, nano-Al/hydrothermal MoO3 and nano-Al/referenced Fe2O3.

Литература

[1]Bazyn T., Lynch P., Krier H., et al. Combustion Measurements of Fuel-Rich Alumi-num and Molybdenum Oxide Nano-Composite Mixtures, Propellants, Exposives, Pyrotechnics. 2010, 35, 93-99.
[2]Xu D., Yang Y., Cheng H., et al. Integra-tion of Nano-Al with Co3O4 Nanorods to Realize High-Exothermic Core- Shell Nanoenergetic Ma-terials on a Silicon Substrate, Combustion and Flame, 2012, 159, 2202-2209.
Опубликован
2017-12-28
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