中文摘要：

采用对航天器聚合物介质进行非线性电导改性的方法消除或削弱材料的内带电现象，以期达到消除介质脉冲放电对航天器可靠性的威胁的目标。实验研究发现，采用具有非线性电导率特性的粉粒（添加剂）对航天器用阿FE和EP进行改性，该两种复合介质’材料均可产生显著的非线性电导特性。而且，该种添加剂可以显著降低FFFE的非线性电导阈值，改变EP的非线性电导特性的陡度，而不会对两种材料的直流电气强度产生显著影响。

英文摘要：

In order to reach the aim of eliminating the dangerous pluse discharge threatening the reliability and life of spacecraft, the method of improving the conductivity character to eliminate or weaken the phenomena of deepcharge of polymer dielectric was adopted. It is found that, by modifying the spacecraft polymer PTFE and EP resin with a kind of inorganic powder possessing non-linear conductivity, both materials can all produce a remarkable nonlinear conductivity character. The experiment shows that the additive can change the non-linear conductivity threshold ofPYFE toward lower electric field greatly ; as for epoxide resin, the gradient of non-linear conductivity character can be changed remarkably by this modification ; but the DC electrical strength of the two polymer composites almost keeps no changed by this modification.