This study investigates the electrical behavior of silicon nitride/epoxy nanocomposites. It is demonstrated that the presence of the nanofiller affects the resin/hardener stoichiometry, which results in the development of different network structures throughout the matrix polymer. However, detailed analysis shows that this stoichiometric effect cannot account, alone, for the observed changes in the electrical behavior of the nanocomposite samples. A comparison between the electrical behavior of filled and the unfilled samples, where appropriate stoichiometric compensation has been applied, indicates that there is an additional effect that is exclusively a function of the nanofiller loading and which is superimposed on any matrix chemistry effects. Potential explanations for this nanoparticle effect are discussed, including nanoparticle agglomeration, water shells around the nanoparticles, the influence of nanoparticles on matrix dynamics, structure or the free volume content of polymer interphase.

中文翻译：

---

化学计量对氮化硅/环氧树脂纳米复合材料交直流击穿的影响

本研究调查了氮化硅/环氧树脂纳米复合材料的电学行为。结果表明，纳米填料的存在会影响树脂/硬化剂的化学计量，从而导致在整个基质聚合物中形成不同的网络结构。然而，详细的分析表明，这种化学计量效应不能单独解释纳米复合材料样品电行为的观察变化。在已应用适当的化学计量补偿的情况下，填充样品和未填充样品的电行为之间的比较表明，存在额外的效应，该效应完全是纳米填料负载的函数，并且叠加在任何基质化学效应上。讨论了这种纳米粒子效应的潜在解释，