Until now, the reported dielectric constants of the ceramic/polymer composites are rather low, even though their corresponding bulk ceramics have colossal dielectric constants. This work demonstrates that ceramic/polymer composites can achieve colossal dielectric constants by constructing three-dimensionally interwoven structures. Furthermore, the ceramic/polymer dielectric composites exhibit high mechanical strength. As an example, CaCu₃Ti₄O₁₂/epoxy dielectric composites with such interwoven structures are fabricated in this work. The CaCu₃Ti₄O₁₂/epoxy composites exhibit both colossal dielectric constant and high flexural strength, both of which rapidly increase with the CaCu₃Ti₄O₁₂ content. When the CaCu₃Ti₄O₁₂ content is about 57.7 vol%, the dielectric constant and flexural strength of the CaCu₃Ti₄O₁₂/epoxy composites are about 1501 at 1 MHz and 118.8 MPa, respectively. Their dielectric constants are much higher than the predicted values by the existing theoretical models for ceramic/polymer dielectric composites. A modified parallel model is proposed to explain the presence of colossal dielectric constants of the ceramic/polymer composites.

迄今为止，尽管所报道的陶瓷/聚合物复合材料的介电常数相当低，即使其相应的块状陶瓷具有巨大的介电常数。这项工作表明，陶瓷/聚合物复合材料可以通过构建三维交织结构来实现巨大的介电常数。此外，陶瓷/聚合物介电复合材料表现出高机械强度。例如，在该工作中制造了具有这种交织结构的CaCu ₃ Ti ₄ O ₁₂ /环氧介电复合材料。CaCu ₃ Ti ₄ O ₁₂ /环氧树脂复合材料既显示出巨大的介电常数又具有高的抗弯强度，两者均随CaCu的增加而迅速增加。₃ Ti ₄ O ₁₂含量。当CaCu ₃ Ti ₄ O _12的含量为约57.7vol％时，CaCu ₃ Ti ₄ O ₁₂ /环氧复合材料的介电常数和抗弯强度在1MHz和118.8MPa下分别为约1501。它们的介电常数远远高于现有的陶瓷/聚合物介电复合材料理论模型的预测值。提出了一种改进的并行模型来解释陶瓷/聚合物复合材料的巨大介电常数的存在。