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High‐Energy Pollen‐Like Porous Fe 2 O 3 /Al Thermite: Synthesis and Properties
Author(s) -
Hu Xiuli,
Liao Xin,
Xiao Leqin,
Jian Xiaoxia,
Zhou Weiliang
Publication year - 2015
Publication title -
propellants, explosives, pyrotechnics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.56
H-Index - 65
eISSN - 1521-4087
pISSN - 0721-3115
DOI - 10.1002/prep.201500046
Subject(s) - thermite , materials science , exothermic reaction , porosity , mixing (physics) , chemical engineering , adsorption , reactive material , sorbent , aluminium , analytical chemistry (journal) , metallurgy , chemistry , composite material , chromatography , organic chemistry , physics , quantum mechanics , engineering
A pollen‐like porous Fe 2 O 3 /Al thermite was prepared by a templated method, with aluminium nanoparticles (Al‐NPs) embedded in the porous channels. The thermite prepared by reduced pressure released the largest exothermic heat during DSC testing period compared with Fe 2 O 3 /Al thermites prepared by ultrasonic mixing and physical mixing. The exothermic heats in the range of 773 K to 1273 K are 3742.3 J g −1 , 2279.0 J g −1 , 1981.1 J g −1 , and 2621.0 J g −1 for pollen‐like Fe 2 O 3 /Al by reduced pressure, pollen‐like Fe 2 O 3 /Al by ultrasonic mixing, pollen‐like Fe 2 O 3 /Al by physical mixing, and commercial Fe 2 O 3 /Al by ultrasonic mixing, respectively. The reactivity between Fe 2 O 3 and Al‐NPs was efficiently improved, corresponding to its enlarged contact surface area between Al‐NPs and the porous pollen‐like Fe 2 O 3 , and the reduced pre‐combustion sintering. Furthermore, pollen‐like Fe 2 O 3 /Al has good compatibility with both RDX and HMX and it is not compatible with Cl‐20 and GAP.