碳化硅导电胶对电火工品性能的影响

Effect of Silicon Carbide Conductive Adhesive on the Performance of Electric-explosive Device

为了研究碳化硅导电胶中碳化硅与环氧树脂胶配比对电火工品静电防护、绝缘电阻及发火感度等性能的影响,调节了碳化硅与环氧树脂胶的配比,制备了10种不同配比的碳化硅导电胶材料,按照GJB5309.6-2004《火工品试验方法》规定的静电放电试验、绝缘电阻测定方法,测试了未涂敷碳化硅导电胶和涂敷不同配比碳化硅导电胶条件下某制式电火工品的最高静电防护电压、脚壳绝缘电阻以及发火性能参数,获得了碳化硅导电胶对电火工品性能的影响规律。结果表明,碳化硅与环氧树脂胶配比为1.25∶1时,该电火工品的最高静电电压防护能力达到30 kV,能够满足测试电压低于100 V时绝缘电阻值>20 MΩ的要求,又不影响产品的发火性能。

To study the effect of ratio of silicon carbide to epoxy resin in SiC conductive adhesive on the performances of electrostatic protection,insulation resistance and ignition sensitivity for electric-explosive device,the ratio of silicon carbide to epoxy resin was adjusted,ten kinds of silicon carbide conductive adhesive materials with different proportions were prepared. According to an electrostatic discharge test and a method for measuring insulation resistance prescribed in GJB5309.6-2004 ＂ Test methods for initiating explosive devices＂,the highest electrostatic protection voltage,the insulation resistance of the foot and shell and the ignition performance parameters for a standard initiating explosive device under the condition that the SiC conductive adhesive is not coated and the SiC conductive adhesive is coated with different proportions were measured. The influence law of SiC conductive adhesive on the performance of electric was obtained. Results shows that when the ratio of silicon carbide to epoxy resin is 1.25 ∶ 1. the highest electrostatic voltage protection capability of the initiating explosive device reaches 30 kV,and when the test voltage is less than 100 V,it can meet the requirement of insulation resistance value 20 MΩ,at the same time it does not affect the ignition performance of the product.