Preparation of Nano-Cu-Cr Composite Metal Oxides via Mechanical Grinding Method and Its Catalytic Performance for the Thermal Decomposition of Ammonium Perchlorate

被引：0

作者：

Hao G.-Z. ^{[1
,2
]}

Li L. ^{[3
]}

Gou B.-W. ^{[3
]}

Xiao L. ^{[1
]}

Hu Y.-B. ^{[1
]}

Liu J. ^{[1
,2
]}

Jiang W. ^{[1
,2
]}

Zhao F.-Q. ^{[3
]}

Gao H.-X. ^{[3
]}

机构：

[1] School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing

[2] Key Laboratory of Special Energy Materials (Nanjing University of Science and Technology), Ministry of Education, Nanjing

[3] Xi'an Modern Chemistry Research Institute, Xi'an

来源：

Huozhayao Xuebao/Chinese Journal of Explosives and Propellants | 2019年 / 42卷 / 06期

关键词：

Ammonium perchlorate; Material science; Mechanical grinding; Nano-composite metal oxides; Synergistic catalysis; Thermal decomposition;

D O I：

10.14077/j.issn.1007-7812.201905015

中图分类号：

学科分类号：

摘要：

To enhance the catalytic effect of nano-sized copper oxide on the thermal decomposition of ammonium perchlorate (AP), a series of nano-Cu-Cr composite metal oxides (nano CuO/Cr2O3) with different molar ratios of CuO and Cr2O3 (1: 2, 1: 1, 1: 0.5 and 1: 0.25) were prepared by a mechanical grinding method. The microstructures, surface elements and morphologies of these nano-composite metal oxides were characterized and analyzed by using X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The catalytic effects of the nano-Cu-Cr composite metal oxides on the thermal decomposition of AP were investigated by thermogravimetric (TG) analysis and differential scanning calorimetric (DSC) techniques, and the effect of the nano CuO/Cr2O3 content on the thermal decomposition of AP was also discussed. The results show that adding 2%(mass fraction) nano-Cu-Cr composite metal oxide with the molar ratio (1: 0.25) of CuO and Cr2O3 has the best catalytic effect for the thermal decomposition of the AP compared with the other nano-Cu-Cr composite metal oxides, pure nano CuO or nano Cr2O3. Additionally, the decomposition temperature of AP decreases from 441.3℃ to 351.1℃, the Gibbs free energy of AP reduces from 199.8kJ/mol to 172.1kJ/mol, whereas the decomposition heat rises from 941 J/g to 1778 J/g. The reason may be due to that the high energy grinding force field in the process of the mechanical grinding results in the lattice change of nano CuO and nano Cr2O3, which promotes their synergistic catalytic effect on the thermal decomposition of AP. © 2019, Editorial Board of Journal of Explosives & Propellants. All right reserved.

引用

页码：557 / 565

页数：8

共 22 条

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