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首页> 外文期刊>Combustion Science and Technology >THERMAL BEHAVIOR AND NON-ISOTHERMAL KINETIC STUDIES ON TITANIUM HYDRIDE-FUELED BINARY PYROTECHNIC COMPOSITIONS
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THERMAL BEHAVIOR AND NON-ISOTHERMAL KINETIC STUDIES ON TITANIUM HYDRIDE-FUELED BINARY PYROTECHNIC COMPOSITIONS

机译：氢化钛二元烟火组合物的热行为和非等温动力学研究

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摘要

This study describes thermochemical properties and ignition characteristics of pyrotechnic compositions consisting of TiH_2 + KCIO_3, TiH_2 + KCIO_4, and TiH_2 + Ba(NO_3)_2, where titanium hydride is used as fuel and KCIO_3, KCIO_4, and Ba(NO_3)_2 act as oxidants. Differential thermal analysis (DTA) and thermogravimetry (TG) techniques hare been employed to elucidate the reaction process of these pyrotechnic systems. TGIDTA analysis of pure titanium hydride indicates that this compound decomposes at 535℃. By replacing KCIO_3 with KCIO_4 as oxidizer in a titanium hydride-fueled mixture, the sensitivity of the mixture decreases. A TiH_2 + KCIO_3 pyrotechnic mixture has a fusion temperature around 358℃ and ignition temperature around 472℃, A TiH_2 + KCIO_4 pyrotechnic system decomposes at 541.5℃. However, replacing KCIO_4 with Ba(NO_3)_2 in this mixture, increases the ignition temperature of the mixture by at least 30℃ to～ 570℃, which is a safe temperature for preventing activation of the mixture by accidental factors such as static electricity. The apparent activation energy (E), △G#, △H#, and △S# of the combustion processes were obtained from the DSC experiments. Thermokinetic data shows that the relative reactivity of these mixtures decrease in the following order: TiH_2 + KCIO_3 > TiH_2 + KCIO_4 > TiH_2 + Ba(NO_3)_2.
机译：这项研究描述了由TiH_2 + KCIO_3，TiH_2 + KCIO_4和TiH_2 + Ba（NO_3）_2组成的烟火组合物的热化学性质和着火特性，其中氢化钛用作燃料，KCIO_3，KCIO_4和Ba（NO_3）_2充当燃料。氧化剂。差热分析（​​DTA）和热重分析（TG）技术已被用来阐明这些烟火系统的反应过程。 TGIDTA分析纯氢化钛表明该化合物在535℃分解。通过在氢化钛为燃料的混合物中用KCIO_4作为氧化剂代替KCIO_3，混合物的灵敏度降低。 TiH_2 + KCIO_3烟火混合物的熔化温度约为358℃，着火温度约为472℃，TiH_2 + KCIO_4烟火系统在541.5℃时分解。但是，在此混合物中用Ba（NO_3）_2代替KCIO_4会使混合物的着火温度提高至少30℃，达到570℃，这是防止混合物因意外因素（例如静电）活化的安全温度。通过DSC实验获得了燃烧过程的表观活化能（E），△G＃，△H＃和△S＃。热动力学数据表明，这些混合物的相对反应性按以下顺序降低：TiH_2 + KCIO_3> TiH_2 + KCIO_4> TiH_2 + Ba（NO_3）_2。

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