采用熔融共混和多层热压的方法制备了4种三明治结构的氧化铝/低密度聚乙烯(Al2O3/LDPE)纳米复合材料.利用电声脉冲法测试了复合材料短路时的空间电荷消散曲线,通过电流测试平台研究了复合材料在常温不同直流电场下的电导率变化.结果表明:三明治结构Al2O3/LDPE复合材料的电荷消散速度明显高于纯LDPE,且在高电场下其电导率小于纯LDPE.这是由于通过三明治结构较大程度地将深陷阱引入到LDPE复合材料表面,有效抑制了电荷的注入.
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