This paper reports on an investigation into the effects of different multi-element oxide nanofillers on the structure and dielectric properties of polypropylene (PP)-based nanocomposites. Magnesium aluminate (MgAl ₂ O ₄ ), calcium carbonate (CaCO ₃ ) and surface-modified calcium carbonate (CaCO ₃ T) have been added to the PP to determine their effects on thermal properties, structural changes, dielectric response and breakdown strength. The results show that PP nanocomposites containing MgAl ₂ O ₄ possess lowered breakdown strength compared to unfilled PP. In contrast, adding CaCO ₃ to PP results in a higher breakdown strength of the nanocomposites compared to nanocomposites containing MgAl ₂ O ₄ . Meanwhile, nanocomposites containing CaCO ₃ T possess the highest breakdown strength among the systems considered. Possible mechanisms governing these dielectric property changes under alternating current and direct current electric fields are discussed.

中文翻译：

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聚丙烯/多元素氧化物纳米复合材料的结构-介电性能关系

本文报道了对不同的多元素氧化物纳米填料对聚丙烯（PP）基纳米复合材料的结构和介电性能的影响的研究报告。将铝酸镁（MgAl ₂ O ₄ ），碳酸钙（CaCO ₃ ）和表面改性的碳酸钙（CaCO ₃ T）添加到PP中，以确定它们对热性能，结构变化，介电响应和击穿强度的影响。结果表明，与未填充的PP相比，含MgAl ₂ O _4的PP纳米复合材料的 击穿强度较低。相比之下，添加CaCO ₃与包含MgAl ₂ O ₄的纳米复合材料相比，对PP的吸附会导致纳米复合材料具有更高的分解强度 。同时， 在所考虑的系统中，包含CaCO ₃ T的纳米复合材料 具有最高的击穿强度。讨论了在交流电和直流电场下控制这些介电特性变化的可能机制。