Preparation And Catalytic Properties Of Nano-unsteady Oxide

In this paper, three non-steady-state metal oxide catalyst (Cu2O, Co3O4, NiO) were prepared by nitrate-Nitrilotriacetic acid solution combustion,and depth study the catalytic properties of the catalyst on the AP.Also these three catalysts effects were studied on the safety performance of the AP. Further different amounts of itself which reduced the sensitivity of the expanded graphite were added to the the cryogenic solution combustion system. The expanded graphite in the formation of the metal oxide particles, the particle size and catalytic thermal decomposition effects of the AP were studied.First, nitrate-nitrilotriacetic acid-expanded graphite was used to prepared Cu2O nanocrystals particles, which obtained Cu2O particle diameter of about100nm, and R=0(R is a nitrilotriacetate NO3-molar ratio,0for the stoichiometric ratio) as the optimal reaction. The results showed that added KOH can reduce Cu2O particle sintering. While in the nitrate-nitrilotriacetic acid-expanded graphite system, the addition of1.0g of the expanded graphite, particle regular shape, uniform dispersion, agglomeration and sintering less were showed.The research showed that expanded graphite have a certain role of the polymerization inhibitor. Nano Cu2O and Cu2O containing expanded graphite exhibit good catalytic performance of the thermal decomposition of AP. Containing expanded graphite was added to the AP,and its the pyrolysis temperature of about87.702℃lower than that of pure AP.The heat released about1121.4J/g. AP+Cu2O+expanded graphite can reduce friction sensitivity from84%to about32%of the pure AP.Secondly, the use of low-temperature solution prepared Co3O4was processed with previous studies of copper nitrate system. The study found the pure of Co3O4prepared under the optimal reaction conditions of R=-25. By XRD, SEM and TEM, it showed that different R can be produced different products.As the R value increases, the possibility of generating a single mass of Co is increased. In the nitrate-nitrilotriacetate system, optimum reaction R=-25under conditions different molar ratio of the expanded graphite, the study found that n (cobalt nitrate):n (expansive graphite)=1:5as the optimal reaction. Co3O4particle size is about20nm, the uniform particle size distribution and agglomeration was less. Co3O4nanoparticles containing expanded graphite catalytic thermal decomposition of than pure AP high temperature decomposition exothermic peak temperature is reduced by99.574℃than the pure AP. Heat released is about1131.2J/g, the friction sensitivity has also improved.Finally, the expanded graphite solution combustion prepared NiO particles through nitrate-nitrilotriacetic acid and the NiO particle size of was about40nm. The preparation obtained by adding1.0g of expanded graphite, the size of NiO was about10nm and uniform particle size distributed well, also less reunited. The experiments showd that the expansion of the graphite-containing NiO catalyticed AP thermal decomposition, the exothermic peak temperature was decreased about72.23℃than the high temperature decomposition of pure AP. The exotherm was about782.5J/g. The friction sensitivity also reduced to36%from84%of the pure AP. In summary, the addition of expanded graphite has an impact on the AP catalytic thermal decomposition and sensitivity.