Abstract In this work, dielectric behaviors of dielectric resonance, relaxation, and plasma-like negative permittivity are observed in percolative copper/rutile cermets. Transition for permittivity changing from positive to negative is associated with composition and determined by percolation. The resonance and relaxation responses are related to isolated metallic particles or clusters. Negative permittivity is induced by the plasmonic state of electrons within percolating pathways and dielectric loss of epsilon-negative composites is dominated by conduction loss. Besides, the percolative cermets change from electrical capacitive to inductive with the permittivity transition. Epsilon-negative cermets are expected to be used for electromagnetic shielding and coil-less electrical inductors.

中文翻译：

---

铜/金红石金属陶瓷的介电色散：介电共振、弛豫和等离子体振荡

摘要 在这项工作中，在渗透性铜/金红石金属陶瓷中观察了介电共振、弛豫和类等离子体负介电常数的介电行为。介电常数从正变为负的转变与成分相关并由渗透决定。共振和弛豫响应与孤立的金属粒子或簇有关。负介电常数是由电子在渗透路径中的等离子体状态引起的，并且 epsilon 负复合材料的介电损耗由传导损耗决定。此外，随着介电常数的转变，渗透金属陶瓷从电容性变为电感性。Epsilon 负金属陶瓷有望用于电磁屏蔽和无线圈电感器。