Study on kinetic parameters and phenomena of Li/SF₆ reaction

In order to investigate the phenomenon and kinetic parameters of Li/SF₆ combustion under different temperature and pressure conditions, the ignition delay period of Li/SF₆ combustion test platform was measured by using the shock wave induced high pressure thermal load excitation when the temperature range was 830 K~1 400 K and the pressure range was 0.8 atm~11 atm. The law of Li/SF₆ combustion process and basic luminescence phenomena were investigated by visualization experiment section. Based on the typical Arrhenius dependence between ignition delay period and temperature and pressure, the reaction kinetic parameters were obtained by multiple linear regression method. The results show that the ignition delay period of Li/SF₆ combustion decreases with the increase of temperature and pressure, and the luminescence phenomenon gradually changes from red isolated fire nucleus to white bright flame with the increase of pressure. The pre-index factor A, exponential factor n and activation energy Ea are obtained based on the experimental ignition delay period, which provides an important basis for the identification of combustion characteristics and the construction of numerical simulation.