The manipulation of interfacial structures offers an effective route to improve the physical and chemical properties of materials. However, it is challenging to design ceramic-based composites with hybrid interfaces involved with organics and inorganics through the conventional sintering technique, due to the incompatibility of these materials at high temperatures. Here, we propose a strategy to integrate poly-ether-ether-ketone together with several metal-oxide additives into zinc oxide (ZnO) to form composite varistors via cold sintering process. Nanoscale layers of hybrid additives are dispersed between densified ZnO grain structures forming Schottky barriers, which dramatically improves the electrical properties of the resulted composites. Compared with pure ZnO, the breakdown electric field at 0.1 mA mm⁻² reaches over 13 kV mm⁻¹. Particularly, the composite shows a switch-like effect similar with switching devices, with an extraordinarily high nonlinear coefficient of 375. In addition, the elastic module decreases with the addition of PEEK. Given the flexibility in the dopants of polymers and metal oxides, this work provides a unique route to design composite materials with superior performances.

界面结构的操纵为改善材料的物理和化学性能提供了有效途径。然而，由于这些材料在高温下的不相容性，通过传统的烧结技术设计具有有机物和无机物混合界面的陶瓷基复合材料具有挑战性。在这里，我们提出了一种策略，将聚醚醚酮与几种金属氧化物添加剂结合到氧化锌 (ZnO) 中，通过冷烧结工艺形成复合压敏电阻。纳米级混合添加剂层分散在致密的 ZnO 晶粒结构之间，形成肖特基势垒，这显着改善了所得复合材料的电性能。与纯 ZnO 相比，0.1 mA mm ^-2处的击穿电场达到超过 13 kV mm ^-1。特别是，该复合材料显示出与开关器件类似的开关效应，非线性系数非常高，为 375。此外，弹性模量随着 PEEK 的加入而降低。鉴于聚合物和金属氧化物掺杂剂的灵活性，这项工作为设计具有卓越性能的复合材料提供了独特的途径。