一种新型引燃电极材料的研究

A new type of ignitor material

根据引燃电极的性能要求,选取碳化硼、氮化硼等原料,采用粉末冶金法制得了无毒、引燃率高、性能稳定的新型引燃电极。然后用X射线衍射仪(XRD)和扫描电子显微镜(SEM)分析了材料的微观结构,并分析了引燃电极成分、表面形貌及冷热电阻对电极的引燃性能的影响。研究表明:引燃电极主体材料中的碳化硼将增强电极的导电性能,氮化硼可以增加热导率并调节电阻,使电极在高温下保持较高的电阻而正常工作;表面形貌将影响样品的引燃性能,致密度高、孔隙率低的样品,其导电能力和耐压能力强,引燃性能好;引燃电极冷电阻的大小只能给电极与水银的接触情况和工作状态提供判断依据,给电极引燃性能的好坏提供粗略的参考,不能为其提供判断依据。

Based on the performance requirement of the ignitor, raw materials such as B4C 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 B4 C 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 between the ignitor and the mercury, it offers referrence for the ignitor.