La0. 8Sr0. 2CoO3-δ的合成、表征及对硝胺改性双基推进剂的燃烧性能影响研究

doi:10.3969/j.issn.1000-1093.2013.09.003

摘要/Abstract

摘要：

为探讨钙钛矿型氧化物对硝胺改性双基推进剂燃烧性能的影响,用硬脂酸凝胶燃烧法制备了钙钛矿型La_{0. 8}Sr_{0. 2}CoO_3-δ,运用X 射线衍射(XRD)、扫描电镜(SEM)、傅里叶变换红外(FT-IR)光谱及光电子能谱(XPS)技术对所得粉体进行了表征,并用热重-差示扫描量热(TG-DSC) 技术研究了La_{0. 8}Sr_{0. 2}CoO_3-δ对推进剂中主要组分黑索今( RDX) 的催化热分解作用,实验了La_{0. 8}Sr_{0. 2}CoO_3-δ粉体对硝胺改性双基推进剂的燃速和压力指数的影响。结果表明: 添加2. 0 % La_{0. 8}Sr_{0. 2}CoO_3-δ可使RDX 分解峰温提前, 且分解热增加; 与不加La_{0. 8}Sr_{0. 2}CoO_3-δ相比, 在所有的压力下,La_{0. 8}Sr_{0. 2}CoO_3-δ的少量添加使推进剂燃速有不同程度的提高,且使推进剂的压强指数降低;与LaCoO₃相比,La_{0. 8}Sr_{0. 2}CoO_3-δ对硝胺改性双基推进剂的燃烧表现了更好的催化作用。

关键词: 兵器科学与技术, La_{0. 8}Sr_{0. 2}CoO_3-δ, 热分解, RDX, 硝胺改性双基推进剂

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

中图分类号:

TQ133. 3

卫芝贤, 王雅乐, 高原, 刘吉平, 左英英. La_{0. 8}Sr_{0. 2}CoO_3-δ的合成、表征及对硝胺改性双基推进剂的燃烧性能影响研究[J]. 兵工学报, 2013, 34(9): 1072-1077.

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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