Synthesis and Characteristics of La0. 8Sr0. 2CoO3-δand Its Effect on Combustion Property of Nitramine Modified Double-base Propellant

doi:10.3969/j.issn.1000-1093.2013.09.003

Abstract

Abstract:

Perovskite-type La_{0. 8}Sr_{0. 2}CoO_3-δ was prepared by a stearic acid gel combustion method in order to investigate the effect of the perovskite oxides on the combustion property of the nitramine modified double-base propellant. The obtained powder is characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM),Fourier transform infrared (FT-IR) and X-ray photoelectron spectroscopy (XPS)techniques. The catalytic action of La_{0. 8}Sr_{0. 2}CoO_3-δ on the thermal decomposition of hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) is investigated by TG-DSC technique. The burning rates of nitramine modified double-base propellant at various pressures are studied to evaluate the ballistic property. The experimental results show that La_{0. 8}Sr_{0. 2}CoO_3-δ can catalyze the thermal decomposition of RDX, and the heat of decomposition can be increased by 34.7J/g by adding 2.0% (棕) of La_{0. 8}Sr_{0. 2}CoO_3-δinto RDX. Compared with basic propellant, the burning rate of propellant modified by La_{0. 8}Sr_{0. 2}CoO_3-δ increases at all the pressures. However, the burning rate increases more slowly with the increase of pres-sure, and hence the pressure index of the propellant is reduced. La_{0. 8}Sr_{0. 2}CoO_3-δ has the better catalyticaction in comparison with LaCoO₃.

Key words: ordnance science and technology, La_{0. 8}Sr_{0. 2}CoO_3-δ, thermal decomposition, RDX, nitramine modified double-base propellant

CLC Number:

TQ133. 3

WEI Zhi-xian, WANG Ya-le, GAO Yuan, LIU Ji-ping,ZUO Ying-ying. Synthesis and Characteristics of La_{0. 8}Sr_{0. 2}CoO_3-δand Its Effect on Combustion Property of Nitramine Modified Double-base Propellant[J]. Acta Armamentarii, 2013, 34(9): 1072-1077.

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Synthesis and Characteristics of La_{0. 8}Sr_{0. 2}CoO_3-δand Its Effect on Combustion Property of Nitramine Modified Double-base Propellant

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