In order to reveal the physical effect of Al/PTFE (mass percentage of 50%/50%) heat conduction and deflagration reaction induced by temperature gradient under the condition of flame heating, the loading and testing systems of cookoff experiment were conducted to measure the thermal response and electrical output characteristics of Al/PTFE before and after deflagration induced by temperature gradient. The thermal shock wave and thermoelectromotive force before deflagration, voltage signal induced by flame plasma expansion after deflagration were measured simultaneously. Meanwhile, the flash signal and the evolutionary process of flame region and temperature after deflagration were obtained. The results show that the thermal shock wave was generated by emergent temperature change in the stage of heat conduction, and the thermoelectromotive force was generated by the superposition of temperature gradients in different regions. The thermoelectromotive force can be equivalent to the series connection of electric source in each striped region. Under the temperature gradient of 6-10 K/mm, the maximum thermoelectromotive force can reach 0.8 V. Before deflagration, the local phase transition of molten or gaseous state induced by thermal decomposition destroyed the stable distribution of the temperature gradient of the sample, which leads to the decrease of the thermoelectric force. Based on the electric output signal of flame plasma, the reaction was divided into two stages including deflagration stage (lasting for 2–3 s) and stable combustion stage (lasting for about 10s). The average temperature of flame first increased and then decreased abruptly. The maximum temperature was 1585 K, and the propagation rate of flame was about 81.6 m/s in the initial stage of deflagration; however, the average temperature of the flame decreased slowly in the stable combustion stage, there was no obvious electrical output and the flash intensity decreased.

为揭示火焰加热条件下温度梯度引起的Al / PTFE（质量百分比为50％/ 50％）的热传导和爆燃反应的物理效应，采用了蒸煮实验的加载和测试系统来测量温度梯度引起的爆燃前后Al / PTFE的热响应和电输出特性。同时测量了爆燃前的热冲击波和热电动势，以及爆燃后火焰等离子体膨胀引起的电压信号。同时获得了爆燃后的闪光信号以及火焰区域和温度的演变过程。结果表明，热冲击波是由热传导阶段的温度变化引起的，热电动势是由不同区域温度梯度的叠加产生的。热电动势可以等效于每个条纹区域中电源的串联连接。在6-10 K / mm的温度梯度下，最大热电动势可以达到0.8V。爆燃前，热分解引起的熔融或气态的局部相变破坏了样品温度梯度的稳定分布，从而导致热电势下降。根据火焰等离子体的电输出信号，反应分为两个阶段：爆燃阶段（持续2到3 s）和稳定燃烧阶段（持续约10 s）。火焰的平均温度先升高然后突然降低。在爆燃初期，最高温度为1585 K，火焰的传播速度约为81.6 m / s。然而，火焰的平均温度在稳定的燃烧阶段缓慢下降，没有明显的电输出，而闪光强度下降。