对比研究了氧化镁/交联聚乙烯电缆绝缘复合材料和传统的交联聚乙烯材料的击穿强度、力学性能、形态与分布、热稳定性和结晶度。结果表明，与传统交联聚乙烯相比，纳米复合材料的直流击穿强度、交流击穿强度、拉伸强度和初始分解温度分别提高了约20%、8%、7%和10%，介电常数和介质损耗因数基本不变，表明氧化镁纳米粒子的加入可提高电力电缆绝缘材料的击穿强度、力学性能和热稳定性。
The breakdown strength, mechanical properties, morphology, thermal stability and crystallinity of MgO/cross-linked polyethylene(XLPE) nanocomposites and traditional XLPE material were compared and studied. The results show that compared with traditional XLPE material, the direct current(DC) and alternating current(AC) breakdown strength, tensile strength and initial degradation temperature(IDT) of the nanocomposites increase by 20%, 8%, 7% and 10% respectively, and the dielectric constant and dielectric loss factor change little, which indicate that the addition of MgO nanoparticles can increase the breakdown characteristic, mechanical properties and thermal stability of power cable insulating materials.
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