氧烛中锰金属粒径对氯酸钠热解的催化作用

发布时间：2018-04-20 02:32

  本文选题：氧烛 + 金属燃料　； 参考：《工程科学学报》2017年08期

【摘要】：分别制备了两组粒径的Mn金属燃料(平均粒径分别为18.73和5.24μm),利用激光粒度分析仪测试了其粒径分布,扫描电镜分析了表面形貌,能谱仪确定了所含元素.对NaClO_3,NaClO_3与Co_3O_4,NaClO_3、Co_3O_4与Mn的混合物分别进行了热重与示差扫描量热联合分析实验(TGA-DSC),通过对比各混合物热解起始温度及其他特征温度,探究了Mn金属粒径对NaClO_3热解的催化强度与热解稳定性的影响.研究结果表明:Co_3O_4虽对NaClO_3热解具有催化性,热解开始温度(To)由512.3℃下降为333.0℃,但其可导致NaClO_3热解的不稳定,热解阶梯由1个变为3个;Mn金属燃料对NaClO_3中间产物具有明显的催化性,且随着粒径减小,催化强度逐渐增加,热解终止温度(Tf)由419.8℃下降为351.9℃,同时NaClO_3热解阶梯减少,热解温度区间变窄(由180.6℃减小为19.4℃),热解更加稳定.
[Abstract]:Two groups of mn metal fuels with average particle sizes of 18.73 and 5.24 渭 m were prepared respectively. The particle size distribution was measured by laser particle size analyzer, the surface morphology was analyzed by SEM, and the elements were determined by energy spectrometer. The TGA-DSCC of the mixture of NaClO _ 3 / NaClO _ S _ 3 and Co _ 3O _ S _ 4 / NaClO _ 3O _ 4 / C _ 3O _ 3O _ 4 and mn were carried out respectively. By comparing the starting temperature and other characteristic temperatures of each mixture, The effects of mn particle size on the catalytic strength and pyrolysis stability of NaClO_3 were investigated. The results show that although the pyrolysis of NaClO_3 is catalytic, the starting temperature of pyrolysis decreases from 512.3 鈩，

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