A new type of ignitor material

Based on the performance requirement of the ignitor, raw materials such as B4C and BN were chosen to produce a new type of ignitor with no poison, high igniting and good performance with powder metallurgy technology. The microcosmic structure of the ignitor was analysed by using XRD and SEM method. The performance factors such as ingredient,surfacial idensity,cold resistance and hot resistance were discussed. The results indicate that B4C can enhance electric performance of the ignitor and BN can increase hot transmittability and tune up the resistance of the ignitor and make the ignitor work stably in high temperature. Surface appearance influences the ignition performance seriously. The cold resistance and the hot resistance of the ignitor can only offer judgement for the contact bet