MgH₂, TiH₂, and ZrH₂ are three typical metal hydrides that have been gradually applied to composite explosives and propellants as additives in recent years. To evaluate ignition sensitivity and explosion severity, the Hartmann device and spherical pressure vessel were used to test ignition energy and explosion pressure, respectively. The results showed that the ignition sensitivity of ZrH₂, TiH₂ and MgH₂ gradually increased. When the concentration of MgH₂ is 83.0 g/m³ in Hartmann device, the ignition energy attained a minimum of 10.0 mJ. The explosion pressure of MgH₂ were 1.44 times and 1.76 times that of TiH₂ and ZrH₂, respectively, and the explosion pressure rising rate were 3.97 times and 9.96 times that of TiH₂ and ZrH₂, respectively, through the spherical pressure vessel. It indicated that the reaction reactivity and reaction rate of MgH₂ were higher than that of TiH₂ and ZrH₂. In addition, to conduct in–depth theoretical analysis of ignition sensitivity and explosion severity, gas production and combustion heat per unit mass of ZrH₂, TiH₂ and MgH₂ were tested by mercury manometer and oxygen bomb calorimetry. The experimental results revealed that MgH₂ had a relatively high gas production per unit mass (5.15 mL/g), while TiH₂ and ZrH₂ both had a gas production of less than 2.0 mL/g. Their thermal stability gradually increased, leading to a gradual increase in ignition energy. Furthermore, compared with theoretical combustion heat, the combustion ratio of MgH₂, TiH₂ and ZrH₂ was more than 96.0%, with combustion heat value of 29.96, 20.94 and 12.22 MJ/kg, respectively, which was consistent with the explosion pressure and explosion severity test results.

MgH ₂、TiH ₂和ZrH ₂是近年来逐渐应用于复合炸药和推进剂中的三种典型金属氢化物作为添加剂。为了评估点火敏感性和爆炸严重程度，分别使用哈特曼装置和球形压力容器来测试点火能量和爆炸压力。结果表明，ZrH ₂、TiH ₂和MgH ₂的点火敏感性逐渐增加。当Hartmann装置中MgH ₂的浓度为83.0 g/m ³时，点火能量达到最低10.0 mJ。MgH ₂的爆炸压力分别是TiH ₂和ZrH _{2 的}1.44倍和1.76倍，通过球形压力容器的爆炸压力上升率分别是TiH ₂和ZrH _{2 的}3.97倍和9.96倍。表明MgH ₂的反应活性和反应速率高于TiH ₂和ZrH ₂。此外，对ZrH ₂、TiH ₂和MgH ₂的点火敏感性和爆炸严重程度、产气量和单位质量燃烧热进行深入的理论分析通过水银压力计和氧弹量热法测试。实验结果表明，MgH _{2 的}单位质量产气量较高（5.15 mL/g），而TiH ₂和ZrH _{2 的}产气量均小于2.0 mL/g。它们的热稳定性逐渐增加，导致着火能量逐渐增加。此外，与理论燃烧热相比，MgH ₂、TiH ₂和ZrH ₂的燃烧比大于96.0%，燃烧热值分别为29.96、20.94和12.22 MJ/kg，与爆炸压力和爆炸严重性测试结果。