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Flash pyrolysis of MnTC([Mn2(TNR)2(CHZ)2(H2O)4]·2H2O) and NiCT([Ni(CHZ)3](TNR)·5H2O) is conducted by using T-jump/FTIR spectroscopy under 0.1 MPa Ar atmosphere. The mole fractions of the individual products in the pyrolysis gas mixture are described as a function of time. Results show that NiCT appears to produce more N2O, NH3 and HONO upon flash pyrolysis, thus secondary oxidation reduction reactions may take place to a certain extent during its thermal decomposition, which in turn leads to unsteady combustion and possibly to failure of the device. While H2O and CO2 are the major two gas products of flash pyrolysis of MnTC, it warrants further in-depth trials for the adoption in detonators as eco-friendly and chemically compatible primary explosive. The two compounds both liberate volatile metal carbonate, oxide and isocyanate compounds. 相似文献
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用差示扫描量热仪(DSC)测定了一定温度区间硝酸碳酰肼类配合物硝酸碳酰肼锰(Mn(CHZ)3(NO3)2)、硝酸碳酰肼钴(Co(CHZ)3(NO3)2)、硝酸碳酰肼镍(Ni(CHZ)3(NO3)2)和硝酸碳酰肼锌(Zn(CHZ)3(NO3)2)的比热容,利用Origin7.0软件回归出比热容随温度变化的方程式, Ni(CHZ)3(NO3)2和Mn(CHZ)3(NO3)2在一些温度区间为六次函数或二、三次函数,其余大多数符合四次或五次函数,拟合时相关度最小为0.987,标准偏差最大为0.017.除Zn(CHZ)3(NO3)2外,其余三种硝酸碳酰肼盐配合物的比热容有较大变化,出现一个或多个峰值.对它们进行了热重和红外分析,200 ℃时仅Co(CHZ)3(NO3)2失重8.64%,其余两种的热重曲线没有变化;红外图谱显示在不同的温度下同一物质的指纹区不同,故推测样品可能发生了晶形转变而导致比热容变化. 相似文献
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低硫可膨胀石墨制备新工艺 总被引:2,自引:0,他引:2
研究了一种以天然磷片石墨为原料,硫酸和硝酸的混酸为氧化剂,癸醇为还原剂,制备低硫可膨胀石墨的新工艺。确定了可膨胀石墨的最佳制备条件:石墨与硫酸、硝酸、癸醇的质量比为1:3:2:0.1,反应时间为40min,反应温度60℃。在此条件下制得的可膨胀石墨的硫含量小于1%,膨胀容积达330mL/g。 相似文献