【摘要】 研究了不同导电填料填充液体硅橡胶的电阻率及屏蔽值随填料配比、拉力的变化特性。发现在低阻值情况下可用Schelkunoff理论较好地描述其屏蔽效果,且屏蔽值随着阻值的改变产生了类似于渗滤现象的突变;在102Ω·cm以下随着电阻率的降低,屏蔽效果迅速增加。同时根据隧道导电理论推导了其阻值随拉力的变化关系,可近似用二次多项式表示,将实验结果按此式拟合,符合得很好。更多还原

【Abstract】 The dependence of electrical resistance and shielding effectiveness on filler proportioning and tensile force are studied in liquid silicone rubber with different conductive fillers.The result shows that in low resistance shielding effectiveness(SE) can be described well with Schelkunoff theory.The SE brings the saltation like percolation phenomena with the change of resistance.Under 10~2Ω·cm SE is increased rapidly with the decreasing of resistivity.According to the tunneling conductive theory,the dependence of electrical resistance on the tensile force is derived,which can be expressed in the form of polynomial,the experimental results are in excellent with this formula.更多还原