We explored the thermal decomposition properties of Fluoronitriles-N₂ (C₄F₇N-N₂) gas mixture using as SF₆ substitute gas in GIE. The yield of main decomposition products of 10%C₄F₇N-90%N₂ gas mixture under different overheating temperature and gas pressure conditions were detected and analyzed. We found that thermal decomposition of C₄F₇N-N₂ mainly produces C₃F₆, C₃F₈, CF₄, CF₃CN, (CN)₂ and COF₂. C₃F₆ is the first detected by-product at 350℃, while CF₄ and C₃F₈ were generated at temperatures higher than 450℃. The yield and formation rate of C₃F₆, (CN)₂ increases with temperatures lower than 450℃ then decreases at higher temperatures, while the generation of C₃F₈, CF₄, CF₃CN and COF₂ has positive correlation with temperature. C₄F₇N-N₂ gas mixture has great thermal stability at high pressure. The increase of gas pressure could effectively reduce the decomposition of C₄F₇N, which ensures the insulation strength of gas mixture.

我们在GIE中使用SF ₆替代气体探索了氟腈-N ₂（C ₄ F ₇ N-N ₂）混合气的热分解特性。在不同的过热温度和气压条件下，对10％C ₄ F ₇ N-90％N ₂混合气体的主要分解产物的收率进行了检测和分析。我们发现C ₄ F ₇ N-N _2的热分解主要产生C ₃ F ₆，C ₃ F ₈，CF ₄，CF ₃ CN，（CN）₂和COF ₂。C ₃ F ₆是在350℃时首次检测到的副产物，而CF ₄和C ₃ F ₈是在450℃以上的温度下生成的。C ₃ F ₆，（CN）₂的产率和形成速率随温度低于450℃而增加，然后随温度升高而降低，而C ₃ F ₈，CF ₄，CF ₃ CN和COF _2的生成与温度。C ₄ F ₇ N-N ₂气体混合物在高压下具有很高的热稳定性。气体压力的增加可以有效地减少C ₄ F ₇ N的分解，从而保证了气体混合物的绝缘强度。