【摘要】 研究了微米Al2O3.3H2O/环氧复合材料的脉冲真空闪络影响因素。分别给出了固化剂、分散方法、偶联剂对复合材料闪络特性的影响和纯环氧表面抛光前后的脉冲真空闪络特性。实验结果表明:酸酐固化的试样比胺类固化试样闪络电压要高;高速分散方法与超声波分散方法相比,采用前者制备的复合材料有更好的分散特性;使用偶联剂处理填料比不使用时得到的环氧复合材料闪络电压高;抛光后的纯环氧试样有较高的闪络电压。更多还原

【Abstract】 The factors on pulsed vacuum flashover of epoxy composite filled with micro-scale Al2O3·3H2O particles are studied.The effects of coupling agent,dispersion method,curing agent,and surface roughness on the flashover properties are investigated respectively.Compared with the amine curing agent,the casting epoxy resin cured by the acid anhydride has higher flashover voltage.The epoxy composite matrix dispersed by the high shear force has better disperse effect compared with that dispersed by the ultrasonic dispersion method.Epoxy composite filled with micro-scale particles treated by coupling agent has higher flashover voltage than that without coupling agent treatment.After surface polishing,the flashover voltage of the epoxy sample becomes higher.更多还原