Structure and breakdown property relationship of polyethylene nanocomposites containing laboratory-synthesized alumina, magnesia and magnesium aluminate nanofillers

摘要: Abstract The emergence of polymer nanocomposites has led to a new field study in advanced dielectrics. Commonly, few weight percent single-metal oxide nanofillers been added polymers, and promising dielectric property changes have found. Nevertheless, contradictory results also reported, where the use resulted degraded breakdown performances. Recently, experimental studies on ceramics showed that multi-element could compact structure with entirely different chemical, mechanical electrical properties from ceramics. This approach is, however, less pursued perspective In current work, polyethylene containing laboratory-synthesized nanofillers, i.e., alumina (Al2O3) magnesia (MgO), nanofiller, magnesium aluminate (MgAl2O4) nanofiller were compared. MgO higher strength than Al2O3. Significantly, MgAl2O4 much Al2O3, values be comparable or even unfilled under DC AC applied fields. Possible mechanisms governing these are discussed.