In order to investigate the influence of aluminum vapor on the breakdown performance of air, this paper makes a study of the dielectric breakdown characteristics of Al-air mixture in the temperature range of 300–5000 K at atmospheric pressure. A Boltzmann analysis method is used to deal with the electron energy distribution function (EEDF), the reduced ionization coefficients (α/N), the reduced attachment coefficients (η/N) and the critical reduced breakdown strength ((E/N)_cr) so as to explore the influence of temperature and mixing ratio on the dielectric breakdown properties. In the temperature range of 300–2000 K, the property of the mixture is mainly determined by the mixing proportion of aluminum vapor because the composition of particles remains unchanged. In the temperature range of 2000–2500 K, the decomposition of Al₂O₂ leads to the increase of aluminum oxides and NO, and a rise in the percentage of high-energy electrons as well as the increment of α/N. Also, the joint action of O₂ and NO makes η/N increase first and then decrease, and (E/N)_cr goes down to a smaller temperature range. An increase in the proportion of aluminum vapor causes (E/N)_cr to decrease in the low-temperature region and to increase in the high-temperature region, which will reduce the transition between these two temperature regions.

为了研究铝蒸气对空气击穿性能的影响，本文研究了大气压下300-5000 K温度范围内铝-空气混合物的介电击穿特性。玻尔兹曼分析方法用于处理电子能量分布函数 (EEDF)、还原电离系数 ( α / N )、还原附着系数 ( η / N ) 和临界还原击穿强度 (( E / N ) _cr) 以探讨温度和混合比对介电击穿性能的影响。在 300-2000 K 的温度范围内，混合物的性质主要由铝蒸气的混合比例决定，因为颗粒的组成保持不变。在 2000-2500 K 温度范围内，Al ₂ O ₂分解导致氧化铝和 NO 增加，高能电子百分比增加，α / N增加。另外，O ₂和NO的共同作用使η / N先增大后减小，( E / N ) _cr下降到较小的温度范围。铝蒸气比例的增加导致( E / N ) _cr在低温区降低，在高温区增加，这将减少这两个温度区之间的转变。