Preparation of Nano-sized Copper Chromite via a Mechanical Grinding Method and Its Effect on Thermal Decomposition ofAmmonium Perchlorate

doi:10.3969/j.issn.1000-1093.2015.09.008

Abstract

Abstract: Nano-sized CuCr₂O₄ (copper chromite) with a particle size of 60 nm is prepared in large-scale via a HLG-5 type nanometer grinder. The microstructure and morphology of sample are characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The catalytic effects of industrial CuCr₂O₄, nano-CuCr₂O₄ prepared by coprecipitation method and nano-CuCr₂O₄ prepared by mechanical grinding method on thermal decomposition of ammonium perchlorate (AP) are investigated by a differential scanning calorimeter (DSC). The results show that nano-CuCr₂O₄ prepared by mechanical grinding method has the best catalytic effect on AP as compared to the former two, improving the reaction rate constant and decreasing the high temperature decomposition activation energy. Nano-CuCr₂O₄ prepared by mechanical grinding method is promising as a high-performing combustion catalyst in AP-based composite propellants.

Key words: ordnance science and technology, nano-sized copper chromite, mechanical grinding, ammonium perchlorate, thermal decomposition, catalytic effect

CLC Number:

V512

HAO Ga-zi, LIU Jie, XIAO Lei, GAO Han, JIANG Wei, LI Feng-sheng,. Preparation of Nano-sized Copper Chromite via a Mechanical Grinding Method and Its Effect on Thermal Decomposition ofAmmonium Perchlorate[J]. Acta Armamentarii, 2015, 36(9): 1654-1659.

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